var checkRows = function () {    var rows = document.getElementsByName("checkedId");    var checkAll = document.getElementById("checkAll");    var checkedRows = '';    for (var i = 0; i < rows.length; i++) {        if (checkAll.checked == true) {            rows[i].checked = true;            if (checkedRows.length > 0) {                checkedRows += ",";            }            checkedRows += rows[i].value;        }else {            if (rows[i].checked) {                if (checkedRows.length > 0) {                    checkedRows += ",";                }                checkedRows += rows[i].value;            }        }    }    return checkedRows;}