checkbox多选
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<script language="javascript">
function selectIt(){
form=document.lzyy
action=event.srcElement.name
for(var i=0; i<form.elements.length; i++){
if(form.elements.name=="checkbox"){
e=form.elements
e.checked=(action=="selectAll")?(form.selectAll.checked):(!e.checked)
}
}
}
</script>
<form name="lzyy">
<p> 全 选
<input type="checkbox" name="selectAll" value="checkbox" >
<br>
反 选
<input type="checkbox" name="invest" value="checkbox" >
<br>
Item1
<input type="checkbox" name="checkbox" value="checkbox">
<br>
Item2
<input type="checkbox" name="checkbox" value="checkbox">
<br>
Item3
<input type="checkbox" name="checkbox" value="checkbox">
<br>
Item4
<input type="checkbox" name="checkbox" value="checkbox">
<br>
Item5
<input type="checkbox" name="checkbox" value="checkbox">
</p>
</form>
</body>
</html>
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