How to Select or Deselect the Same Checkboxes on Two Forms

How to select or deselect the same checkboxes on two forms?

The example shows how to check or uncheck a checkboxes in one form and the checkboxes in another form will be checked or unchecked as well.

<html>
<head>
<script> 
function CheckAll()
{
count = document.frm1.elements.length;
    for (i=0; i < count; i++) 
	{
    if(document.frm1.elements[i].checked == 1)
    	{document.frm2.elements[i].checked = 1; }
    else {document.frm2.elements[i].checked = 0;}
	}
}
</script>
</head>
<body>
<form name="frm1">Form 1
<input type="checkbox" onclick="CheckAll()" value="Check All"/>
<input type="checkbox" onclick="CheckAll()" value="Check All"/>
<input type="checkbox" onclick="CheckAll()" value="Check All"/>
<input type="checkbox" onclick="CheckAll()" value="Check All"/>
<input type="checkbox" onclick="CheckAll()" value="Check All"/> 
</form>
<form name="frm2">Form 2
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
</form> 
</body>
</html>

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Copy checkboxes' value

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