checkbox全选优秀代码

<script language="javascript">

function selectAll() //全选

{

var arrObj = document.all;

for(var i = 0; i < arrObj.length;i++)

{



if(typeof arrObj[i].type != "undefined" && arrObj[i].type=='checkbox') arrObj[i].checked =true;

}

}



function unSelectAll() //全不选

{

var arrObj = document.all;

for(var i = 0; i < arrObj.length;i++)

{

if(typeof arrObj[i].type != "undefined" && arrObj[i].type=='checkbox') arrObj[i].checked =false;

}

}

</script>