Checkboxes error

JavaScript
1

i need to make the check all and uncheck all buttons works with the checkboxes named “check_list”

<SCRIPT LANGUAGE="JavaScript">
<!--

<!-- Begin
function CheckAll(chk)
	{
		for (i = 0; i < chk.length; i++)
		chk[i].checked = true ;
	}

function UnCheckAll(chk)
	{
		for (i = 0; i < chk.length; i++)
		chk[i].checked = false ;
	}
// End -->
</script>


<form name="addproducts" action="checkboxes.asp" method="post">
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<input type="button" name="Check_All" value="Check All"
onClick="CheckAll(document.addproducts.check_list)">
<input type="button" name="Un_CheckAll" value="Uncheck All"
onClick="UnCheckAll(document.addproducts.check_list[])">
2 

<input type="button" name="Check_All" value="Check All"
onClick="CheckAll(document.addproducts['check_list[]'])">
<input type="button" name="Un_CheckAll" value="Uncheck All"
onClick="UnCheckAll(document.addproducts['check_list[]'])">

:wink: