Check all Checkboxes

<script type=”text/javascript”>
function checkAll(fieldName, val)
{
var chkarr = document.getElementsByName(fieldName);
for(r=0;r<chkarr.length;r++)
{
if (val == true)
chkarr[r].checked = true;
else
chkarr[r].checked = false;
}
}
</script>
Check All
Mango
Banana
Apple