<head>
<script>
function CheckAll()
{
count = document.frm.elements.length;
for (i=0; i < count; i++)
{
if(document.frm.elements[i].checked == 0)
{document.frm.elements[i].checked = 1; }
else {document.frm.elements[i].checked = 1;}
}
}
function UncheckAll(){
count = document.frm.elements.length;
for (i=0; i < count; i++)
{
if(document.frm.elements[i].checked == 1)
{document.frm.elements[i].checked = 0; }
else {document.frm.elements[i].checked = 0;}
}
}
</script>
</head>
<body>
<form name="frm">
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input name="btn" type="button" onclick="CheckAll()" value="Check All">
<input name="btn" type="button" onclick="UncheckAll()" value="Uncheck All">
</form>
</body>
</html>
Simple as this, remember to change the form name, to your own form name. (Marked in Bold).
Got the code from here
If you like to learn more about SLIIT please visit www.sliit.lk
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