`

Javascript全选,反选,全不选

 
阅读更多
http://www.cnblogs.com/shige/archive/2009/02/10/1387020.html
Ext 4.0 API http://docs.sencha.com/ext-js/4-0/#!/api
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">

function checkEvent(name,allCheckId)
{
  var allCk=document.getElementById(allCheckId);
  if(allCk.checked==true)
  checkAll(name);
  else
  checkAllNo(name);
  
}

//全选
function checkAll(name)
{
  var names=document.getElementsByName(name);
  var len=names.length;
  if(len>0)
  {
   var i=0;
   for(i=0;i<len;i++)
   names[i].checked=true;
    
  }
}

//全不选
function checkAllNo(name)
{
  var names=document.getElementsByName(name);
 var len=names.length;
 if(len>0)
  {
    var i=0;
    for(i=0;i<len;i++)
    names[i].checked=false;
  }
}

//反选
function reserveCheck(name)
{
  var names=document.getElementsByName(name);
 var len=names.length;
 if(len>0)
 {
 var i=0;
   for(i=0;i<len;i++)
   {
     if(names[i].checked)
     names[i].checked=false;
     else
     names[i].checked=true;
     
   }
 } 

}

</script>
</head>

<body>
<input type="checkbox" id="ckall" onclick="checkEvent('ck','ckall')" />全选
<input type="checkbox" id="ckReserve" onclick="reserveCheck('ck','ckReserve')" />反选
    <br />
<input type="checkbox" name="ck" value="1" />篮球
    <br />
<input type="checkbox" name="ck" value="2" />旅游
    <br />
<input type="checkbox" name="ck" value="3" />读书
 <br />
<input type="checkbox" name="ck" value="4" />美食
    <br />
<input type="checkbox" name="ck" value="5" />睡觉
</body>

</html>
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