function selectedAll(allselect, obj) {$("#"+obj.id+" input:checkbox").each(function () {if (allselect.checked)$(this).attr("checked", true);else {$(this).attr("checked", false);}});}
调用
<input id="allCheck" οnclick="selectedAll(this, document.getElementById('cbl_cg'))" type="checkbox" name="allCheck" />全选/反选