เพิ่ม Row ลบ Row (Javascript) เราจะกำหนด ID ยังไงคะ

โค้ดตอนคลิกเพิ่ม Row
function addLineItemRow(toTable, type){
	var myBodies = E(toTable).tBodies[0];
	var myRow = myBodies.insertRow(myBodies.rows.length);
	alert("add no. "+myBodies.rows.length+" Row Index : "+myRow.rowIndex +"Length All : "+lengthAll);

	for(var i = 0; i<12; i++){
		eval("var myCell"+i+"=myRow.insertCell("+i+");");	
	}
myCell1.innerHTML= '<input type="text" class="lineitem_suggestion" item="'+myRow.rowIndex+'" name="line_item[name][]" id="LineItemProductName'+myRow.length+'" size="45"/>';
}

โค้ดตอนลบ Row

function delLineItemRow(obj){
	if(confirm("คุณต้องการลบกระเบื้องแผ่นนี้?")){
		var myRow = obj.parentNode.parentNode;
		var myBodies = myRow.parentNode;
		myBodies.deleteRow(myRow.rowIndex-1);
		resetLineItemRow(myBodies);	
	}
}

function resetLineItemRow(myBodies){
	for(var i=0;i<myBodies.rows.length;i++){
		myBodies.rows[i].cells[0].innerHTML = (i+1);
		myBodies.rows[i].cells[0].innerHTML = eval(i+1)+'<input type="hidden" name="line_item[ref_record][]" id="ref_record'+eval(i+1)+'" value="'+eval(i+1)+'" size="2"/><input type="hidden" name="countRecordLineItem" id="countRecordLineItem" value="'+myBodies.rows.length+'" size="2"/><input type="hidden" name="type_forValidate" id="type_forValidate" value="1"/>';	
		myBodies.rows[i].style.backgroundColor = (i%2 == 0)? '#EEEEEE' : '#DDDDDD';
	}
}