鼠标框选多选框-优快云博客

<html>
<head>
<SCRIPT language=JavaScript>
/*--------------------------------------------
本程式为鼠标框选 多选框 辅助 帮手,其中还有不足.
1. 不能将多选框单独放到body标签中.
2. 多选框使用名子为ck+自然数, 如ck1.
3. 就先这么多吧,可能还有...........
       制作者:八神奄 QQ:13730452
--------------------------------------------*/
var x0;
var y0;
var selectenable=0;

function initChkBox(obj){
var coll=document.forms["form1"].tags("input");
    for (i=0;i<coll.length;i++){
     if (coll.item(i).name.substr(0,2)=="ck") {
   var offsetTop = 0;
   var offsetLeft = 0;
   var objP = coll.item(i);
   while (objP.tagName!="BODY" && objP){
    offsetTop += objP.offsetTop;
    offsetLeft += objP.offsetLeft;
    objPobjP = objP.offsetParent;
   }
   coll.item(i).X=offsetLeft+10;
   coll.item(i).Y=offsetTop+10;
   //alert(coll.item(i).X+","+coll.item(i).Y+","+coll.item(i).offsetHeight);
  }
 }
}

function initselect() {
       if (window.event.srcElement.tagName=="BODY") {
        window.event.returnValue = true;
        return;
       }
    
        x0=document.body.scrollLeft+event.clientX;
     y0=document.body.scrollTop+event.clientY;
  selectarea.setCapture();
     selectenable=1;
}
function startselect() {
    if (selectenable==1) {
        selectarea.style.visibility='visible';
  
        if(document.body.scrollLeft+event.clientX-x0>0) {
      selectarea.style.left=x0;
      selectarea.style.width=document.body.scrollLeft+event.clientX-x0;
    }
        else{
      selectarea.style.left=document.body.scrollLeft+event.clientX;
      selectarea.style.width=x0-(document.body.scrollLeft+event.clientX);
     }
        if (document.body.scrollTop+event.clientY-y0>0) {
     selectarea.style.top=y0; 
     selectarea.style.height=document.body.scrollTop+event.clientY-y0;
     }
       else{
     selectarea.style.top=document.body.scrollTop+event.clientY;
     selectarea.style.height=y0-(document.body.scrollTop+event.clientY);
     }
 }
    window.event.returnValue = true;
}

function endselect() {
 if (selectenable==0) return false;
    selectenable=0;
 selectarea.style.visibility='hidden';
 selectarea.releaseCapture(); 
 document.onmousemove=null;
 var coll=document.forms["form1"].tags("input");
    for (i=0;i<coll.length;i++){
     if (coll.item(i).name.substr(0,2)=="ck") {
/*   if (((coll.item(i).X>selectarea.offsetLeft) && (coll.item(i).X<selectarea.offsetLeft+selectarea.offsetWidth)) && ((coll.item(i).Y>selectarea.offsetTop) && (coll.item(i).Y<selectarea.offsetTop+selectarea.offsetHeight))){
     coll.item(i).checked=!coll.item(i).checked;}
*/     
   if (coll.item(i).X>selectarea.offsetLeft)
    if (coll.item(i).X<selectarea.offsetLeft+selectarea.offsetWidth)  
     if (coll.item(i).Y>selectarea.offsetTop)
      if (coll.item(i).Y<selectarea.offsetTop+selectarea.offsetHeight)
       coll.item(i).checked=!coll.item(i).checked
  }
 } 
 selectarea.style.pixelHeight=0;
 selectarea.style.pixelWidth=0;
}

/*function hideselect() {
    //if (document.body.scrollLeft+event.clientX==x0  &&  document.body.scrollTop+event.clientY==y0  &&  event.srcElement!=selectarea)
    selectarea.style.visibility='hidden';
}*/
function checkAll(){
  document.form1.allsel.checked=false;
  var coll=document.forms["form1"].tags("input");
    for (i=0;i<coll.length;i++){
     if (coll.item(i).name.substr(0,2)=="ck") {
       coll.item(i).checked=false;
   }
  }
}
function change(v){
  var f = document.forms["form1"];
  for (i=0;i<f.elements.length;i++)
    if (f.elements[i].name.substr(0,2)=="ck") f.elements[i].checked = v;
} 
</SCRIPT>

<script language="JavaScript" type="text/JavaScript">
<!--
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape") && (parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
//-->
</script>
<title>鼠标框选多选框</title>
</head>
<body onmousedown="initselect()" onmousemove=startselect() onmouseup=endselect() onselectstart="return false;" onLoad=initChkBox()>
<table width="100%" height="100%" cellpadding="0" cellspacing="0" bgcolor="efefef">
<tr><td>
  <DIV id=selectarea style="border:1px dashed black;HEIGHT: 42px; LEFT: 0px; POSITION: absolute; TOP: 0px; VISIBILITY: hidden; WIDTH: 67px; Z-INDEX: 10"> 
    <img src="null" height="1" width="1" onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"> </DIV>
  <div id="Layer1" style="position:absolute; left:256px; top:39px; width:203px; height:401px; z-index:1"> 
    <form name="form1" action="">
      <table width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="#339999">
        <tr bgcolor="#FFFFFF"> 
          <td width="13%"><input type="checkbox" name="ck1" value="checkbox"></td>
          <td width="87%"> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck2" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck3" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck4" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck5" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck6" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck7" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck8" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck9" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck10" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck11" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck12" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck13" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck14" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck15" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck16" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck17" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck18" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck19" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck20" value="checkbox"></td>
          <td> </td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td><input type="checkbox" name="ck21" value="checkbox"></td>
          <td> </td>
        </tr>
      </table>
      <input type="checkbox" name="allsel" value="checkbox" onclick="change(this.checked)">
      <button onClick="checkAll()">清空</button>
    </form>
  </div>
</td></tr>  
</table>
</body>
</html>