select all checkboxes html js
<script language="JavaScript"> function toggle(source) { checkboxes = document.getElementsByName('foo'); for(var i=0, n=checkboxes.length;i<n;i++) { checkboxes[i].checked = source.checked; } } </script> <input type="checkbox" onClick="toggle(this)" /> Toggle All<br/> <input type="checkbox" name="foo" value="bar1"> Bar 1<br/> <input type="checkbox" name="foo" value="bar2"> Bar 2<br/> <input type="checkbox" name="foo" value="bar3"> Bar 3<br/> <input type="checkbox" name="foo" value="bar4"> Bar 4<br/>