Javascript全选、反选、全不选功能
<html>
<head>
</head>
<body>
<script type="text/javascript">
document.write("<ul>");
for(var i=0; i<20; i++){
document.write("<li>");
document.write('<input type="checkbox" name="ids[]" value="'+i+'">aaaaaaaaa');
document.write("</li>");
}
document.write("</ul>");
</script>
<a href="javascript:sall()">全选</a>
<a href="javascript:fall()">反选</a>
<a href="javascript:nall()">全不选</a>
<script>
var cnames=document.getElementsByName("ids[]");
function sall(){
for(var i=0; i<cnames.length;i++){
cnames[i].checked="true";
}
}
function fall(){
for(var i=0; i<cnames.length;i++){
if(cnames[i].checked){
cnames[i].checked="";
}else{
cnames[i].checked ="true";
}
}
}
function nall(){
for(var i=0; i<cnames.length;i++){
cnames[i].checked="";
}
}
</script>
</body>
</html>
