Select / Deselect All Checkboxes

checkbox_select_all.js

// change selection_all checkbox state
$("[name=\'selection[]\']").change(function() {
    var state = true;
    
    if ($("[name=\'selection[]\']:checked").length != $("[name=\'selection[]\']").length) {
        state = false;
    } else {
        state = true;
    }
    
    $("[name=\'selection_all\']").prop("checked", state);
});

// change selection[] checkboxes state
$("[name=\'selection_all\']").change(function() {
    $("[name=\'selection[]\']").prop("checked", $(this).is(":checked"));
});

// get checked selection[] checboxes as string
$("#w0").submit(function() {
   var checkedIds = $("[name=\'selection[]\']:checked").map(function() {
		   return $(this).val();
   }).get().join();
});