0 To check all checkbox when select-all is checked or to deselect all when select-all is unchecked

Here is the JavaScript code snippet for checking all checkbox when select-all is checked or to deselect all when select-all is unchecked

// to check whether select-all(Select All) check-box is checked or not // call this function when the select-all(Select All)checkbox is clicked function checkAll() { var check = document.getElementsByName("checkAll"); if(check[0].checked==true){ selectAll(check); } else { deSelectAll(check); } } // to select all the check-boxes function selectAll(check){ var check2 = document.getElementsByName("checkItem"); for (var i=0; i<check2.length; i++) { check2[i].checked=true; } } // to de-select all the check-boxes function deSelectAll(check){ var check2 = document.getElementsByName("checkItem"); for (var i=0; i<check2.length; i++) { check2[i].checked=false; } }

- checkAll is the name of the select-all checkbox
- checkItem is the name of the other checkboxes