select发展史

最新推荐文章于 2025-08-13 21:05:35 发布

maimaihang

最新推荐文章于 2025-08-13 21:05:35 发布

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分类专栏： javascript 文章标签： null function javascript border dropdown matrix

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本文介绍如何通过HTML和CSS美化Select下拉框元素，包括更改样式、动态更新选项文本及实现更复杂的交互效果。

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最初的select的确很平淡,就是一个下拉选项列表:

程序代码：

[ 复制代码到剪贴板 ][ 运行代码 ][ 保存代码 ]

日久天长之后,人们对select要求高了,要修一修边幅:

程序代码：

[ 复制代码到剪贴板 ][ 运行代码 ][ 保存代码 ]

<br><br>
<script>
i=1;
</script>
<center>
<form name="form1">
  <select name="select01">
    <option>11111 111111 111111111111</option>
    <option>2222222</option>
    <option>333333</option>
    <option>4444444</option>
  </select>
<span style="position:relative;left:-23px;width:17px;height:17px;font:7px 'wingdings 3';color:#cc0000;background:cyan;border:2px outset;text-align:center;padding-top:3px;cursor:default" onclick="if(i>=document.form1.select01.options.length){i=0}document.form1.select01.options[i].selected=true;i++">q
<iframe src="" style="position:absolute;top:0;left:0;z-index:-1; width:15px;height:15px;filter:alpha(opacity=0))" frameborder="0"></iframe>
</span>
</form>
<br><br><br>

<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style>
.table1{background-color:white;FONT-FAMILY: Courier New, Courier;font-size:12px}
.td_out{FONT-FAMILY: Courier New, Courier;font-size:12px;color:#000000;height:15px;border:1 solid #ffffff;}
.td_over{FONT-FAMILY: Courier New, Courier;font-size:12px;cursor:default;background-color:#3366cc;border:1 solid #000000;color:#ffffff;height:15px}
.slv{vertical-align:bottom;FONT-FAMILY: Courier New, Courier;font-size:12px;border-left-width:0;border-top-width:0;border-bottom-width:0;border-right:0 solid #000000;vertical-align:middle;height:18px;color:#000000;}
.down{position:relative;left:-2px;font-size:11px;vertical-align:middle;width:16;height:16;color:#2050b0;background-color:#D0DFF7;border:1 solid #9fA3Ce;writing-mode:tb-rl;font-weight:bold;
}
.seldiv{
position:absolute;z-index:1000;overflow-x:hidden;border-left:1 solid #000000;border-bottom:1 solid #000000;border-right:1 solid #000000;
SCROLLBAR-FACE-COLOR: #d0dff7;
SCROLLBAR-HIGHLIGHT-COLOR: #d0dff7;
SCROLLBAR-SHADOW-COLOR: #FFFFFF;
SCROLLBAR-3DLIGHT-COLOR: #FFFFFF;
SCROLLBAR-ARROW-COLOR: #ffffff;
SCROLLBAR-TRACK-COLOR: #ffffff;
SCROLLBAR-DARKSHADOW-COLOR: #d0dff7;}
</style>
<script language="JavaScript">
document.onclick=hiddenDiv;
function getDivCount() {
var arr=document.all;
re=0;
for (i=0;i<arr.length;i++) {
  str=arr[i].id;
  if (str.indexOf("ZfDiv_")==0) {
   re++;
  }
}
return re;
}

function getI(ObjId) {//取得objId的最后一位数字
for (i=0;i<ObjId.length;i++) {
  if (ObjId.charAt(i)=="_") return ObjId.substr(i+1,ObjId.length-1);
}
return 0;
}

function select_edit(TextObj){//鼠标经过高亮度
TextObj.focus();TextObj.select();
}

function checkValue(ID){
var sl=document.all["ZfText_"+ID];
var sv=document.all["ZfDiv_"+ID];
var da=document.all["ZfData_"+ID];
sv.style.display=''

for(i=0;i<da.rows.length;i++)da.rows[i].style.display=''

for(i=0;i<da.rows.length;i++){
  if(da.rows[i].cells[0].innerText.indexOf(sl.value)!=0)da.rows[i].style.display='none';
  getPosition(ID);
}
}

function getL(e){
var l=e.offsetLeft;
while(e=e.offsetParent){
  l+=e.offsetLeft;
}
return l
}
function getT(e){
var t=e.offsetTop;
while(e=e.offsetParent){
  t+=e.offsetTop;
}
return t
}

function getPosition(ID){
var sv=document.all["ZfDiv_"+ID];
var sl=document.all["ZfText_"+ID];
var spn=document.all["ZfSpan_"+ID];
var da=document.getElementById("ZfData_"+ID);
sv.style.pixelWidth=spn.offsetWidth;
da.style.pixelWidth=sv.offsetWidth;
sv.style.pixelLeft=getL(spn);
sv.style.pixelTop=getT(spn)+sl.offsetHeight+3;
if(da.offsetHeight>200){
  sv.style.pixelHeight=200;
  sv.style.overflowY='scroll';
}
else {
  sv.style.pixelHeight=da.offsetHeight;
  sv.style.overflowY='hidden';
}
}

function dropDown(ID){
var sv=document.all["ZfDiv_"+ID]
var tb=document.all["ZfData_"+ID]

if(sv.style.display=='none'){
  sv.style.display='';
  for(i=0;i<tb.rows.length;i++)tb.rows[i].style.display=''
  getPosition(ID);
} else {
  sv.style.display='none';
}
}//下拉摸拟层

function hiddenDiv(){
var o=window.event.srcElement.id;
var tb
var sv
if(o=="") {
  for (j=0;j<getDivCount();j++) {
   tb=document.getElementById('ZfData_'+j);
   sv=document.getElementById('ZfDiv_'+j);
   for(i=0;i<tb.rows.length;i++) tb.rows[i].style.display='';
   sv.style.display='none';
  }

}

}//隐藏模拟层

function setValue(obj){
var i=getI(obj.parentElement.parentElement.parentElement.id);
//alert(obj.parentElement.parentElement.parentElement.id);

var sl=document.all["ZfText_"+i];
var sv=document.all['ZfDiv_'+i];
sl.value=obj.innerText;
sv.style.display='none';
//sldIndex=obj.parentElement.rowIndex;
}//给文本框赋值

function over(obj){
obj.className="td_over"
obj.title=obj.innerText
obj.focus();
}//鼠标经过变色

function out(obj){
obj.className="td_out"
}//鼠标离开还原

function String.prototype.Trim(){return this.replace(/(^/s*)|(/s*$)/g,'')}//自定义去空格函数Trim()

//增加list的接口,ID表示该组控件是页面中的第几个
function add(v,ID){
var sv=document.all['ZfDiv_'+ID];
if(!v.Trim()){return;}
var tb=document.all['ZfData_'+ID];
var c=tb.insertRow(tb.rows.length).insertCell();
c.innerHTML='<nobr>'+v.Trim()+'</nobr>';
c.onmouseover=new Function("over(this)");
c.onmouseout=new Function("out(this)");
c.onclick=new Function("setValue(this)");
c.className="td_out";
v='';
}
//增加inpnubox的接口,在页面中产生一个inputbox控件,下拉列表为空
function addText(name,DefValue) {
var i=getDivCount();
document.write('<span id="ZfSpan_'+i+'" style="border:1 solid #9CA0CB">');
document.write('<input type="text" value="'+DefValue+'" name="'+name+'" id="ZfText_'+i+'" ondblclick="ZfDrop_'+i+'.click()" class="slv" onmouseover="select_edit(this)"  onkeyup="checkValue('+i+')"><input type=button id="ZfDrop_'+i+'" value=">" onclick="this.hideFocus=true;dropDown('+i+');" class="down" onmouseover="this.style.backgroundColor=#EEF3FD" onmouseout="this.style.backgroundColor=/'/'" onmousedown="this.style.backgroundColor=#ABC4F5" onmouseup="this.style.backgroundColor=/'/'"></span>');
document.write('<div id="ZfDiv_'+i+'" class="seldiv" style="display:none;"><table id="ZfData_'+i+'" onselectstart="return false" border="0"  cellspacing="0" cellpadding="0" class="table1"></table></div>');
}

</script>
</head>
<body>

<script language="JavaScript">
addText("name1","a");
add("1234",0);
add("1234",0);
addText("name1","a");
add("1234",1);
add("1234",1);
</script>

要加一些链接,变成菜单:

程序代码：

[ 复制代码到剪贴板 ][ 运行代码 ][ 保存代码 ]

<STYLE>
body { cursor: url(http://vip.6to23.com/candylau/image/xiucursor.cur)}
</STYLE>

<style>
.select{border: 0 inset buttonface; width: 100; font: icon; cursor: default;}
.selected{border: 0 inset buttonface; background: window; padding: 0; font: icon;}
.selectTable{height: 100%; width: 100%;border: 2 inset buttonhighlight; background: buttonface;}
.option    {font: icon; padding: 1; padding-left: 3; padding-right: 3; width: 100%;}
.dropDown{position: absolute; visibility: hidden; width: 100%;border: 1 solid windowtext; padding: 0;background: window;}
.select .button    {width: 16px; height: 5; font-family: webdings; padding: 0;font-size: 11px; border: 2 outset buttonhighlight;}
</style>

<script type="text/javascript">
var overOptionCss = "background: highlight; color: highlighttext";
var sizedBorderCss = "2 inset buttonhighlight";
var globalSelect;
var ie4 = (document.all != null);
var q = 0;
function initSelectBox(el) {
    copySelected(el);
    var size = el.getAttribute("size");
    el.options = el.children[1].children;
    el.selectedIndex = findSelected(el);
    el.remove = new Function("i", "int_remove(this,i)");
    el.item   = new Function("i", "return this.options[i]");
    el.add    = new Function("e", "i", "int_add(this, e, i)");
    el.options[el.selectedIndex].selected = true;

    dropdown = el.children[1];

    if (size != null) {
        if (size > 1) {
            el.size = size;
            dropdown.style.zIndex = 0;
            initSized(el);
        }
        else {
            el.size = 1;
            dropdown.style.zIndex = 99;
            if (dropdown.offsetHeight > 200) {
                dropdown.style.height = "200";
                dropdown.style.overflow = "auto";
            }
        }
    }

    highlightSelected(el,true);
}

function int_remove(el,i) {
    if (el.options[i] != null)
        el.options[i].outerHTML = "";
}

function int_add(el, e, i) {
    var html = "<div class='option' noWrap";
    if (e.value != null)
        html += " value='" + e.value + "'";
    if (e.style.cssText != null)
        html += " style='" + e.style.cssText + "'";
    html += ">";
    if (e.text != null)
        html += e.text;
    html += "</div>"

    if ((i == null) || (i >= el.options.length))
        i = el.options.length-1;
    el.options[i].insertAdjacentHTML("AfterEnd", html);
}

function initSized(el) {
    var h = 0;
    el.children[0].style.display = "none";
    dropdown = el.children[1];
    dropdown.style.visibility = "visible";

    if (dropdown.children.length > el.size) {
        dropdown.style.overflow = "auto";
        for (var i=0; i<el.size; i++) {
            h += dropdown.children[i].offsetHeight;
        }

        if (dropdown.style.borderWidth != null) {
            dropdown.style.pixelHeight = h + 4;
        }

        else
            dropdown.style.height = h;
    }

    dropdown.style.border = sizedBorderCss;
    el.style.height = dropdown.style.pixelHeight;
}

function copySelected(el) {
    var selectedIndex = findSelected(el);
    selectedCell = el.children[0].rows[0].cells[0];
    selectedDiv  =     el.children[1].children[selectedIndex];
    selectedCell.innerHTML = selectedDiv.outerHTML;
}

function findSelected(el) {
    var selected = null;

    ec = el.children[1].children;
    var ecl = ec.length;

    for (var i=0; i<ecl; i++) {
        if (ec[i].getAttribute("selected") != null) {
            if (selected == null) {
                selected = i;
            }
            else
                ec[i].removeAttribute("selected");
        }
    }
    if (selected == null)
        selected = 0;

    return selected;
}

function toggleDropDown(el) {
    if (el.size == 1) {
        dropDown = el.children[1];

        if (dropDown.style.visibility == "")
            dropDown.style.visibility = "hidden";

        if (dropDown.style.visibility == "hidden")
            showDropDown(dropDown);
        else
            hideDropDown(dropDown);
    }
}

function optionClick() {
    el = getReal(window.event.srcElement, "className", "option");

    if (el.className == "option") {
        dropdown  = el.parentElement;
        selectBox = dropdown.parentElement;
        oldSelected = dropdown.children[findSelected(selectBox)]

        if(oldSelected != el) {
            oldSelected.removeAttribute("selected");
            el.setAttribute("selected", 1);
            selectBox.selectedIndex = findSelected(selectBox);
        }

        if (selectBox.onchange != null) {
            if (selectBox.id != "") {
                eval(selectBox.onchange.replace(/this/g, selectBox.id));
            }
            else {
                globalSelect = selectBox;
                eval(selectBox.onchange.replace(/this/g, "globalSelect"));
            }
        }

        if (el.backupCss != null)
        el.style.cssText = el.backupCss;
        copySelected(selectBox);
        toggleDropDown(selectBox);
        highlightSelected(selectBox, true);
    }
}

function optionOver() {
    var toEl = getReal(window.event.toElement, "className", "option");
    var fromEl = getReal(window.event.fromElement, "className", "option");
    if (toEl == fromEl) return;
    var el = toEl;
    if (el.className == "option") {
        if (el.backupCss == null)
            el.backupCss = el.style.cssText;
        highlightSelected(el.parentElement.parentElement, false);
        el.style.cssText = el.backupCss + "; " + overOptionCss;
        this.highlighted = true;
    }
}

function optionOut() {
    var toEl = getReal(window.event.toElement, "className", "option");
    var fromEl = getReal(window.event.fromElement, "className", "option");
    if (fromEl == fromEl.parentElement.children[findSelected(fromEl.parentElement.parentElement)]) {
        if (toEl == null)
            return;
        if (toEl.className != "option")
            return;
    }

    if (toEl != null) {
        if (toEl.className != "option") {
            if (fromEl.className == "option")
                highlightSelected(fromEl.parentElement.parentElement, true);
        }
    }

    if (toEl == fromEl) return;
    var el = fromEl;

    if (el.className == "option") {
        if (el.backupCss != null)
            el.style.cssText = el.backupCss;
    }

}

function highlightSelected(el,add) {
    var selectedIndex = findSelected(el);
    selected = el.children[1].children[selectedIndex];

    if (add) {
        if (selected.backupCss == null)
            selected.backupCss = selected.style.cssText;
        selected.style.cssText = selected.backupCss + "; " + overOptionCss;
    }
    else if (!add) {
        if (selected.backupCss != null)
            selected.style.cssText = selected.backupCss;
    }
}

function hideShownDropDowns() {
var el = getReal(window.event.srcElement, "className", "select");
var spans = document.all.tags("SPAN");
var selects = new Array();
var index = 0;

    for (var i=0; i<spans.length; i++) {
if ((spans[i].className == "select") && (spans[i] != el)) {
    ropdown = spans[i].children[1];
if ((spans[i].size == 1) && (dropdown.style.visibility == "visible"))
    selects[index++] = dropdown;
    }
}
for (var j=0; j<selects.length; j++) {
hideDropDown(selects[j]);
}
}

function hideDropDown(el) {
    if (typeof(fade) == "function")
    fade(el, false);
    else
    el.style.visibility = "hidden";
}

function showDropDown(el) {
    if (typeof(fade) == "function")
    fade(el, true);
    else if (typeof(swipe) == "function")
    swipe(el, 2);
    else
    el.style.visibility = "visible";
}

function initSelectBoxes() {
var spans = document.all.tags("SPAN");
var selects = new Array();
var index = 0;

for (var i=0; i<spans.length; i++) {
if (spans[i].className == "select")
selects[index++] = spans[i];
}
for (var j=0; j<selects.length; j++) {
initSelectBox(selects[j]);
}
}

function getReal(el, type, value) {
temp = el;
while ((temp != null) && (temp.tagName != "BODY")) {
if (eval("temp." + type) == value) {
el = temp;
return el;
}
temp = temp.parentElement;
}
return el;
}
if (ie4) {
window.onload = initSelectBoxes;
document.onclick = hideShownDropDowns;
}
function writeSelectBox(matrix, id, size, onchange, css) {
    var d = window.document;
    var ie4 = (document.all != null);
    if (ie4) {
//alert("Before!");
var s = createIEString(matrix, id, size, onchange, css);
document.write(s);
//alert("After!");
}else
{
document.write(createXString(matrix, id, size, onchange, css));}
}

function createIEString(matrix, id, size, onchange, css) {
    var str = "";
        str += '<span class="select"';
        if (size == null)
            size = 1;
        str += ' size="' + size + '"';
        if (id != null)
            str += ' id="' + id + '"';
        if (onchange != null)
            str += ' onchange="' + onchange + '"';
        if (css != null)
        str += ' style="' + css + '"';
        str += '>/n';
        str += '<table class="selectTable" cellspacing="0" cellpadding="0"/n';
        str += ' onclick="toggleDropDown(this.parentElement)">/n';
        str += '<tr>/n';
        str += '<td class="selected"> </td>/n';
        str += '<td align="CENTER" valign="MIDDLE" class="Button"/n';
        str += ' onmousedown="this.style.border=/'2 inset buttonhighlight/'"/n';
        str += ' onmouseup="this.style.border=/'2 outset buttonhighlight/'">/n';
        str += '<span style="position: relative; left: 0; top: -2; width: 100%;">6</span></td>/n';
        str += '</tr>/n';
        str += '</table>/n';
        str += '<div class="dropDown" onclick="optionClick()" onmouseover="optionOver()" onmouseout="optionOut()">/n';

        for (var i=0; i<matrix.length; i++) {
            html     = matrix[i].html;
            value    = matrix[i].value;
            css      = matrix[i].css;
            selected = matrix[i].selected;
            str += '<div class="option"';
            if (value != null)
                str += ' value="' + value + '"';
            if (css != null)
                str += ' style="' + css + '"';
            if (selected != null)
                str += ' selected';
            str += '>/n';
            str += html;
            str += '</div>/n';
        }
        str += '</div>/n';
        str += '</span>/n';
    return str;
}

function createXString(matrix, id, size, onchange, css) {
var str = '<form>/n';
str += '<select';
if (size == null)
    size = 1;
str += ' size="' + size + '"';
if (id != null)
    str += ' id="' + id + '"';
if (onchange != null)
    str += ' onchange="' + onchange + '"';
str += '>/n';

for (var i=0; i<matrix.length; i++) {
    html     = matrix[i].html;
    value    = matrix[i].value;
    css      = matrix[i].css;
    selected = matrix[i].selected;
    str += '/n<option';
    if (value != null)
    str += ' value="' + value + '"';
    if (selected != null)
        str += ' selected';
    str += '>';
    str += stripTags(html);
    str += '</option>/n';
    }
    str += '/n</select>/n';
    str += '</form>/n';
return str;
}

function stripTags(str) {
    var s = 0;
    var e = -1;
    var r = "";
    s = str.indexOf("<",e);
    do {
        r += str.substring(e + 1,s);
        e = str.indexOf(">",s);
        s = str.indexOf("<",e);
    }
    while ((s != -1) && (e != -1))
    r += str.substring(e + 1,str.length);
    return r;
}

function Option(html, value, css, selected) {
    this.html = html;
    this.value = value;
    this.css = css;
    this.selected = selected;
}
</script>
<script type="text/javascript">
var optionArray = new Array();
optionArray[0] = new Option("Item 1", "value 1", "color: blue; text-decoration: underline;");
optionArray[1] = new Option("Item <b>2</b>", "value 2");
optionArray[2] = new Option("Item 3", "value 3", "color: red;", "selected");
optionArray[3] = new Option("Item 4", "value 4");
optionArray[4] = new Option("Item 5", "value 5");
writeSelectBox(optionArray, "select1", 1, "alert(this.options[this.selectedIndex].value)", "margin-left: 10;");
</script>
<br>
<script type="text/javascript">
writeSelectBox(optionArray, "select3", 3, "alert(this.options[this.selectedIndex].value)", "margin-left: 10;");
</script>

<br><br><br><br>
<select onchange="if(this.options[this.selectedIndex].value!=''){location=this.options[this.selectedIndex].value;}" >
<option value="http://www.163.com">网易</option>
<option value="http://www.google.com">google</option>
<option value="http://wwwsohu.com">搜狐</option>
</select>

<br><br><br><br>
<form>
<select size="1" name="D1" onchange=if(s=document.getElementById("S1")){s.style.backgroundColor=value}>
<option selected value="white">请选择颜色</option>
<option value="red">红色</option>
<option value="blue">蓝色</option>
<option value="green">绿色</option>
</select>
<br>
<textarea rows="20" name="S1" cols="35"></textarea>

</form><br><br>

程序代码：

[ 复制代码到剪贴板 ][ 运行代码 ][ 保存代码 ]

后来发展到其文字内容可以增、删、编、改，即可以编辑：

程序代码：

[ 复制代码到剪贴板 ][ 运行代码 ][ 保存代码 ]

<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>EditSelect</title>
<script>
function isIE(){
a=navigator.appVersion.split(";")
b=a[1].split(" ")
return parseFloat(b[2])
}

if (isIE()<5.5)
{
     scHTML='<div id="selectcontent" class="selectdiv" style="visibility:hidden;"><div id="selecthtml" class="selectcontent">selectáD表</div></div>'
}
else
{
     scHTML='<div id="selectcontent" class="selectdiv" style="visibility:hidden;"><iframe id=selframe frameborder=0 height=100%></iframe><div id="selecthtml" class="selectcontent">selectáD表</div></div>'
}

document.write(scHTML)
vDiv=selectcontent
vDivHtml=selecthtml

function editselect(name,size,defaulttext,width,height,readonly){
  var combo=this;
  this.options=new Array();
  this.oj=new Array();
  this.name=name;
  this.divname=name+'_div';
  this.buttonname=name+'_button';
  this.tablename=name+'_table';
  this.htmltable=name+'_html'
  if (!height) this.height=0; else this.height=height
  if (width) this.width=width
  if (!size) size=8
  if (!defaulttext) defaulttext=""
  if (!readonly || readonly==0) {readonly="" }else {if (readonly==1) readonly="readonly style=cursor:default";this.readonly=1}

  esHTML='<div id='+this.divname+'>'
         +'<table id='+this.tablename+' cellpadding=0 cellspacing=0 class=select><tr><td bgcolor=#FFFFFF>'
         +'<input type=text class=selecttext size="'+size+'" name='+name+' value="'+defaulttext+'" '+readonly+'><td><button class=selectbutton id='+this.buttonname+'>6</td></tr></table>'
         +'</div>'
  document.write(esHTML)
  this.sbutton=eval("document.all."+this.buttonname)

  if (this.readonly==1) eval("document.all."+this.name).onclick=function(){combo.show()}

  this.sbutton.onclick=function(){combo.show()}
  this.show=function(){
    pDiv=eval(combo.divname)
    pTable=eval(combo.tablename)
    var vHTML='<table id=htmltable cellspacing="0" cellpadding="2" bgcolor="#ffffff" class="selecttable" width=100%>'
    for (i=0;i<combo.options.length;i++)
      {
       vHTML+='<tr onmouseover="mo(this)" onmouseout="mu(this)" onclick="document.all.'+combo.name+'.value=this.innerText;selectcontent.style.visibility=/'hidden/';'+combo.oj[i]+'"><td nowrap>'+combo.options[i]
      }
     vHTML+="</table>"
    vDivHtml.innerHTML=vHTML

    vtop=pDiv.offsetTop+pDiv.offsetHeight
    vleft=pDiv.offsetLeft+2


    vParent = pDiv.offsetParent;
     while (vParent.tagName.toUpperCase() != "BODY")
{
  vleft += vParent.offsetLeft;
  vtop += vParent.offsetTop;
  vParent = vParent.offsetParent;
}

   var redge=document.body.clientWidth-vleft
   var bedge=document.body.clientHeight-vtop



if (!combo.width) {vDiv.style.width=pTable.offsetWidth} else {vDiv.style.width=combo.width}


    if (combo.height==0)
      {
        vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2
        vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2
      }
      else
      {
         if (htmltable.offsetHeight>combo.height)
          {
            vDiv.style.pixelHeight=combo.height
            vDivHtml.style.pixelHeight=combo.height

            }
           else
           {

              vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2
              vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2
           }

       }

    vDivHtml.scrollTop=0

    if (redge<vDiv.offsetWidth)
      vDiv.style.left=vleft-1-(vDiv.offsetWidth-redge)
        else
      vDiv.style.left=vleft-1


   if (bedge<vDiv.offsetHeight)
    //vDiv.style.top=vtop-vDiv.offsetHeight-pDiv.offsetHeight
    vDiv.style.top=vtop-vDiv.offsetHeight+bedge
         else
      vDiv.style.top=vtop


    vDivHtml.style.width=parseInt(vDiv.style.width)
      vDiv.style.visibility="visible"
  }

  this.add=function(text,js){
     combo.options[combo.options.length]=text
     combo.oj[combo.oj.length]=js

  }

  this.clearall=function(){
  combo.options=new Array()
  }

  this.about=function(){

}
}

function mo(obj){
obj.style.backgroundColor="#000099"
obj.style.color="#ffffff"
}

function mu(obj){
obj.style.backgroundColor=""
obj.style.color="#000000"
}

document.onmousedown=function(){
if (vDiv.style.visibility=="visible"){
mx=event.x + document.body.scrollLeft
my=event.y + document.body.scrollTop;

x1=vDiv.offsetLeft
y1=vDiv.offsetTop

x2=vDiv.offsetLeft+vDiv.offsetWidth
y2=vDiv.offsetTop+vDiv.offsetHeight

if (mx<x1 || my<y1 || x2<mx || y2<my)
   {
     vDiv.style.visibility='hidden'
   }
}
}</script>

<style>
.selecttext{
border:0px
height: 16;
font-family:arial;
font-size:12px;
}
.selectbutton{
font-family:webdings;
font-size:10px;
height: 19;
width: 16;
border:1px solid #83A5EB;
line-height:0px;
padding-bottom:3px;
background-color:#D1E0FD
}
.selecttable{
font-family:arial;
font-size:12px;
cursor:default;
}
.selectcontent
{
position: absolute;
top:0;
left:0;
overflow:auto;
border:1px solid #000000
}

.selectdiv
{
position: absolute;
width:100;
overflow:hidden;
}
.select{
border-collapse: collapse;
border:1px solid #7F9DB9
}
</style>
</head>

<body bgcolor="#83A5EB" background="http://moodboy.com/puterjam/blog/attachments/month_0408/oldr_cs1.JPG">

<table border="0" width="100%">
<tr>
  <td width="151" align="center"><font size="2">可编辑的Select</font></td>
  <td><script>
var sel1=new editselect("select1","25","可编辑的Select","");
sel1.add("这是一个可以编辑的Select")
sel1.add("支持CSS")
sel1.add("可以通过CSS，修改外形")
sel1.add("突破原来的Select诸多限制")
</script></td>
</tr>
<tr>
  <td width="151" align="center"><font size="2">长度可以随意修改
可以设置为只读</font></td>
  <td>
  <script>
var sel2=new editselect("select2","20","长度可以随意修改",250,82,1);
sel2.add("这是一个可以编辑的Select")
sel2.add("支持CSS")
sel2.add("可以通过CSS，修改外形")

sel2.add("作者:舜子制作")
sel2.add("MSN:puterjam@msn.com")
</script>
  </td>
</tr>
<tr>
  <td width="151" align="center"><font size="2">可以遮盖系统Select</font></td>
  <td>
  <script>
var sel3=new editselect("select3","25","可以遮盖系统Select","",41);
sel3.add("这是一个可以编辑的Select")
sel3.add("支持CSS")
sel3.add("可以通过CSS，修改外形")
sel3.add("突破原来的Select诸多限制")
</script>
  </td>
</tr>
<tr>
  <td width="151" align="right">　</td>
  <td><select><option>系统的Select</option></select>　</td>
</tr>
</table>
</body>

</html>

可编辑的select:

程序代码：

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按回车键输入新内容，按DEL删除选中内容<br>
<body bgcolor="#fef4d9" onload="s1.focus();">
<script language="JavaScript">

</script>
<select name=s1 onkeydown="catch_keydown(this);" onkeypress="catch_press(this);" style="font-size:12px;"><option>---</option></select>

程序代码：

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<SCRIPT LANGUAGE="Javascript">
function inputToSelect(text,value)
{
i=0;
while(document.all.sel.options[i])
{
   if(document.all.sel.options[i].text == text)
      return 0;
   i++;
}
var oOption = document.createElement("OPTION");
oOption.text=text;
oOption.value=value;
document.all.sel.add(oOption);
}
</SCRIPT>

<input name="inputx" value="请选择或输入相应内容" onclick="if(this.value=='请选择或输入

相应内容'){this.value='';}else{}" style="border-left:1px solid #000000;border-top:1px solid #000000;border-bottom:1px solid #000000;border-

right:0px solid #000000;width:134;height:22px;" autocomplete="off"><span

style="width:150;overflow:hidden">
    <select id="sel" style="width:150;margin-left:-134;border:1px solid #000000;border-left:0px;height:22px;"

onChange="inputx.value=value" onClick="inputToSelect(inputx.value,inputx.value)">
        <option value="111111111">111111111</option>
        <option value="汉字也可以">汉字也可以</option>
    </select>
</span>

为了让select里有更多的图片、css修饰及其他静、动态修饰效果，而select本身优先级别太高，其修饰效果很少且不能满足上述要求，遂涌现出很多模拟的select:

程序代码：

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程序代码：

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<center><sup><font face="隶书" color="blue">上标是不是这个？</font></sup><font size="6" face="华文行楷" color="red">如果要想以其他的文字作为上标该怎么做啊？</font><sub><font face="黑体" color="green"><b><i>下标是不是这个？</b></i></font></sub>
<br><br>

下面这两个已达到较高的水准（动态内容）：

程序代码：

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<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>EditSelect</title>
<script>
scHTML='<div id="selectcontent" class="selectdiv" style="visibility:hidden;"><iframe id=selframe frameborder=0 height=100%></iframe><div id="selecthtml" class="selectcontent">selectÁÐ±í</div></div>'
document.write(scHTML)
vDiv=selectcontent
vDivHtml=selecthtml

function editselect(name,size,defaulttext,width,height,readonly){
  var combo=this;
  this.options=new Array();
  this.name=name;
  this.divname=name+'_div';
  this.buttonname=name+'_button';
  this.tablename=name+'_table';
  this.htmltable=name+'_html'

  if (!height) this.height=0; else this.height=height
  if (width) this.width=width
  if (!size) size=8
  if (!defaulttext) defaulttext=""
  if (!readonly || readonly==0) {readonly="" }else {if (readonly==1) readonly="readonly style=cursor:default";this.readonly=1}

  esHTML='<div id='+this.divname+'>'
         +'<table id='+this.tablename+' cellpadding=0 cellspacing=0 class=select><tr><td bgcolor=#FFFFFF>'
         +'<textarea type=text class=selecttext cols="'+size+'" rows="1" name='+name+' value="'+defaulttext+'" contenteditable="false" '+readonly+'></textarea><td><button class=selectbutton id='+this.buttonname+'>6</td></tr></table>'
         +'</div>'
  document.write(esHTML)
  this.sbutton=eval("document.all."+this.buttonname)

  if (this.readonly==1) eval(this.name).onclick=function(){combo.show()}

  this.sbutton.onclick=function(){combo.show()}
  this.show=function(){
    pDiv=eval(combo.divname)
    pTable=eval(combo.tablename)
    var vHTML='<table id=htmltable cellspacing="0" cellpadding="2" bgcolor="#ffffff" class="selecttable" width=100%>'
    for (i=0;i<combo.options.length;i++)
      {
       vHTML+='<tr onmouseover="mo(this)" onmouseout="mu(this)" onclick="document.all.'+combo.name+'.innerHTML=/'/';var t=document.createElement(/'span/');t.innerHTML=this.innerHTML;document.all.'+combo.name+'.appendChild(t);selectcontent.style.visibility=/'hidden/'"><td nowrap>'+combo.options[i]
      }
     vHTML+="</table>"
    vDivHtml.innerHTML=vHTML

    vtop=pDiv.offsetTop+pDiv.offsetHeight
    vleft=pDiv.offsetLeft+1


    vParent = pDiv.offsetParent;
        while (vParent.tagName.toUpperCase() != "BODY")
    {
        vleft += vParent.offsetLeft;
        vtop += vParent.offsetTop;
        vParent = vParent.offsetParent;
    }

   var redge=document.body.clientWidth-vleft
   var bedge=document.body.clientHeight-vtop



    if (!combo.width) {vDiv.style.width=pTable.offsetWidth} else {vDiv.style.width=combo.width}


    if (combo.height==0)
      {
        vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2
        vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2
      }
      else
      {
         if (htmltable.offsetHeight>combo.height)
          {
            vDiv.style.pixelHeight=combo.height
            vDivHtml.style.pixelHeight=combo.height

            }
           else
           {

              vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2
              vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2
           }

       }

    vDivHtml.scrollTop=0

    if (redge<vDiv.offsetWidth)
      vDiv.style.left=vleft-1-(vDiv.offsetWidth-redge)
        else
      vDiv.style.left=vleft-1


   if (bedge<vDiv.offsetHeight)
    //vDiv.style.top=vtop-vDiv.offsetHeight-pDiv.offsetHeight
    vDiv.style.top=vtop-vDiv.offsetHeight+bedge
         else
      vDiv.style.top=vtop


    vDivHtml.style.width=parseInt(vDiv.style.width)
      vDiv.style.visibility="visible"
  }

  this.add=function(text){
     combo.options[combo.options.length]=text
  }

  this.about=function(){

}
}

function mo(obj){
obj.style.backgroundColor="#000099"
obj.style.color="#ffffff"
}

function mu(obj){
obj.style.backgroundColor=""
obj.style.color="#000000"
}

document.onmousedown=function(){
if (vDiv.style.visibility=="visible"){
mx=event.x + document.body.scrollLeft
my=event.y + document.body.scrollTop;

x1=vDiv.offsetLeft
y1=vDiv.offsetTop

x2=vDiv.offsetLeft+vDiv.offsetWidth
y2=vDiv.offsetTop+vDiv.offsetHeight

if (mx<x1 || my<y1 || x2<mx || y2<my)
   {
     vDiv.style.visibility='hidden'
   }
}
}
</script>

<style>
.selecttext{
border:0px
height: 22;
font-family:arial;
font-size:14px;
overflow:hidden;
}
.selectbutton{
font-family:webdings;
font-size:10px;
height: 25;
width: 16;
border:1px solid #83A5EB;
line-height:0px;
padding-bottom:1px;
background-color:#D1E0FD
}
.selecttable{
font-family:arial;
font-size:12px;
cursor:default;
}
.selectcontent
{
position: absolute;
top:0;
left:0;
overflow:auto;
border:1px solid #000000
}

.selectdiv
{
position: absolute;
width:100;
overflow:hidden;
}
.select{
border-collapse: collapse;
border:1px solid #7F9DB9
}
</style>
</head>

<body bgcolor="#83A5EB" marginheight="0" marginwidth="0" topmargin="0" leftmargin="0">

<center>
<table border="0" width="234">
    <tr>
        <td width="151" align="center"><font size="2">可编辑的Select</font></td>
        <td><script>
var sel1=new editselect("select1","25","可编辑的Select","");
sel1.add("<marquee behavior=alternate><img src='http://www.blueidea.com/articleimg/bbsimg/icon6.gif' align='absmiddle'>  <B><font color=#22FF22>知</font><font color=#FF2222>往</font><font color=#001199>观</font><font color=#00fffa>来</font></B></marquee>")
sel1.add("<img src='http://www.blueidea.com/articleimg/bbsimg/icon7.gif' align='absmiddle'>  微风香水")
sel1.add("<img src='http://www.blueidea.com/articleimg/bbsimg/icon8.gif' align='absmiddle'>  阳光锈了")
sel1.add("<img src='http://www.blueidea.com/articleimg/bbsimg/icon9.gif' align='absmiddle'>  <B><font color=#22FF22>观</font><font color=#FF2222>往</font><font color=#001199>知</font><font color=#00fffa>来</font></B>")
</script></td>
    </tr>
    <tr>
        <td width="151" align="right">　</td>
        <td> </td>
    </tr>
</table>

程序代码：

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
<style type="text/css">

</style>
<script  lanuage="JScript">
function  turnit(ss)
{

  if  (ss.style.display=="none")
    {ss.style.display="";
}

  else
    {ss.style.display="none";
   }
}
function sele(tid)
{
bb.style.display='none';
text1.value=tid.innerText;
}
function over(tid)
{
for (var i=1;i<4;i++)
{
eval('t'+i).className=''
}
tid.className='ss'
}
function out(tid)
{
if (bb.style.display!='none')
tid.className=''
}
</script>
<style type="text/css">

</style>
</head>

<body style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=green,endColorStr=white);SCROLLBAR-ARROW-COLOR: #fc0048;
SCROLLBAR-TRACK-COLOR: #242400;
SCROLLBAR-BASE-COLOR: #24b400;">
<table width="198" border="0" cellspacing="0" cellpadding="0" align="center">
  <tr>
    <td width="198" nowrap>
<input name="text1" type="text" size="20" class=n1 readonly value=这里头别无选择 onclick=turnit(bb) style="color:red;font-family:隶书;font-size:14px;text-align:center;background:yellow;"><input name="Submit" type="text" class="n2" value="" readonly onclick=turnit(bb)>

    </td>
  </tr>
  <tr>
    <td id=bb style=display:none><div id="Layer1" style="position:absolute; width:198px; height:100px; overflow: scroll; overflow-x:hidden; z-index: 1;SCROLLBAR-ARROW-COLOR: #fc0048;
SCROLLBAR-TRACK-COLOR: #242400;
SCROLLBAR-BASE-COLOR: #24b400;" class="n1" >
        <table width="100%" border="0" cellpadding="0" cellspacing="0" id=tb>
          <tr>
            <td  id=t1 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=lime,endColorStr=white);"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle">金翅擘海</td>
          </tr>
          <tr>
            <td id=t2 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=brown,endColorStr=white);"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle"><B><font color="#22FF22">知</font><font color="#FF2222">往</font><font color="#001199">观</font><font color="#00fffa">来</font></B></td>
          </tr>
          <tr>
            <td id=t3 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=darckblue,endColorStr=white);"><marquee behavior="alternate"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle">海阿洛瓦</marquee></td>
          </tr>

          <tr>
            <td  id=t1 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=pink,endColorStr=white);"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle">蓝色月光</td>
          </tr>
          <tr>
            <td id=t2 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=red,endColorStr=white);"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle"><B><font color="#22FF22">波</font><font color="#FFdd22">希</font><font color="#001199">米</font><font color="#00fffa">亚 </font></B></td>
          </tr>
          <tr>
            <td id=t3 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=green,endColorStr=white);"><marquee behavior="alternate"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle">红色黑客</marquee></td>
          </tr>


        </table>
      </div></td>
  </tr>
</table>

可以去掉下拉的小三角,但不可以无边框:

程序代码：

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