Programatically Check the input with type of checkbox using javascript
<script type="text/javascript">
function selectAll() {
var items = document.getElementsByName('acs');
for (var i = 0; i < items.length; i++) {
if (items[i].type == 'checkbox')
items[i].checked = true;
}
}
function UnSelectAll() {
var items = document.getElementsByName('acs');
for (var i = 0; i < items.length; i++) {
if (items[i].type == 'checkbox')
items[i].checked = false;
}
}
</script>