JS实现的一个颜色选择框

最新推荐文章于 2020-09-19 06:19:26 发布

rjzou2006

最新推荐文章于 2020-09-19 06:19:26 发布

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分类专栏： javascript技术文章标签： border function javascript null table 网络

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<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2311">
<title>颜色对话框</title>
<script type="text/javascript" language="javascript">
<!--
var ColorHex=new Array('00','33','66','99','CC','FF')
var SpColorHex=new Array('FF0000','00FF00','0000FF','FFFF00','00FFFF','FF00FF')
var current=null

function intocolor()
{
var colorTable=''
for (i=0;i<2;i++)
{
for (j=0;j<6;j++)
   {
    colorTable=colorTable+'<tr height=12>'
    colorTable=colorTable+'<td width=11 style="background-color:#000000">'

    if (i==0){
    colorTable=colorTable+'<td width=11 style="background-color:#'+ColorHex[j]+ColorHex[j]+ColorHex[j]+'">'}
    else{
    colorTable=colorTable+'<td width=11 style="background-color:#'+SpColorHex[j]+'">'}

    colorTable=colorTable+'<td width=11 style="background-color:#000000">'
    for (k=0;k<3;k++)
     {
       for (l=0;l<6;l++)
       {
        colorTable=colorTable+'<td width=11 style="background-color:#'+ColorHex[k+i*3]+ColorHex[l]+ColorHex[j]+'">'
       }
     }
}
}
colorTable='<table width=253 border="0" cellspacing="0" cellpadding="0" style="border:1px #000000 solid;border-bottom:none;border-collapse: collapse" bordercolor="000000">'
           +'<tr height=30><td colspan=21 bgcolor=#cccccc>'
           +'<table cellpadding="0" cellspacing="1" border="0" style="border-collapse: collapse">'
           +'<tr><td width="3"><td><input type="text" name="DisColor" size="6" disabled style="border:solid 1px #000000;background-color:#ffff00"></td>'
           +'<td width="3"><td><input type="text" name="HexColor" size="7" style="border:inset 1px;font-family:Arial;" value="#000000"></td></tr></table></td></table>'
           +'<table border="1" cellspacing="0" cellpadding="0" style="border-collapse: collapse" bordercolor="000000" onmouseover="doOver()" onmouseout="doOut()" onclick="doclick()" style="cursor:hand;">'
           +colorTable+'</table>';
colorpanel.innerHTML=colorTable
}

//此函数已被千一网络修改 www.cftea.com
//将颜色值字母大写
function doOver() {
      if ((event.srcElement.tagName=="TD") && (current!=event.srcElement)) {
        if (current!=null){current.style.backgroundColor = current._background}
        event.srcElement._background = event.srcElement.style.backgroundColor
        DisColor.style.backgroundColor = event.srcElement.style.backgroundColor
        HexColor.value = event.srcElement.style.backgroundColor.toUpperCase();
        event.srcElement.style.backgroundColor = "white"
        current = event.srcElement
      }
}

//此函数已被千一网络修改 www.cftea.com
//将颜色值字母大写
function doOut() {

if (current!=null) current.style.backgroundColor = current._background.toUpperCase();
}

//此函数已被千一网络修改 www.cftea.com
function doclick()
{
    if (event.srcElement.tagName == "TD")
    {
        var clr = event.srcElement._background;
        clr = clr.toUpperCase(); //将颜色值大写
        if (targetElement)
        {
            //给目标无件设置颜色值
            targetElement.value = clr;
        }
        DisplayClrDlg(false);
        return clr;
    }
}
-->
</script>
</head>

<body>
<div>
<a href="<a href="http://www.cnsdn.com.cn" target="_blank">http://www.cnsdn.com.cn</a>" target="_blank">中国软件开发网</a>
</div>

请点击文本框：<input type="text" size="8" alt="clrDlg" readonly>

var targetElement = null; //接收颜色对话框返回值的元素

//当点下鼠标时，确定显示还是隐藏颜色对话框
//点击颜色对话框以外其它区域时，让对话框隐藏
//点击颜色对话框色区时，由 doclick 函数来隐藏对话框
function OnDocumentClick()
{
    var srcElement = event.srcElement;
    if (srcElement.alt == "clrDlg")
    {
        //显示颜色对话框
        targetElement = event.srcElement;
        DisplayClrDlg(true);
    }
    else
    {
        //是否是在颜色对话框上点击的
        while (srcElement && srcElement.id!="colorpanel")
        {
            srcElement = srcElement.parentElement;
        }
        if (!srcElement)
        {
            //不是在颜色对话框上点击的
            DisplayClrDlg(false);
        }
    }

}

//显示颜色对话框
//display 决定显示还是隐藏
//自动确定显示位置
function DisplayClrDlg(display)
{
    var clrPanel = document.getElementById("colorpanel");
    if (display)
    {
        var left = document.body.scrollLeft + event.clientX;
        var top = document.body.scrollTop + event.clientY;
        if (event.clientX+clrPanel.style.pixelWidth > document.body.clientWidth)
        {
            //对话框显示在鼠标右方时，会出现遮挡，将其显示在鼠标左方
            left -= clrPanel.style.pixelWidth;
        }
        if (event.clientY+clrPanel.style.pixelHeight > document.body.clientHeight)
        {
            //对话框显示在鼠标下方时，会出现遮挡，将其显示在鼠标上方
            top -= clrPanel.style.pixelHeight;
        }

        clrPanel.style.pixelLeft = left;
        clrPanel.style.pixelTop = top;
        clrPanel.style.display = "block";
    }
    else
    {
        clrPanel.style.display = "none";
    }
}