รบกวนสอบถาม เพิ่ม textbox โดย jquery แบบวน loop หน่อยครับ

<script type="text/javascript">
$(function(){
	$("#addRow").click(function(){
		$("#myTbl").append($("#firstTr").clone());
	});
	$("#removeRow").click(function(){
		if($("#myTbl tr").size()>1){
			$("#myTbl tr:last").remove();
		}else{
			alert("ไม่สามารถลบได้แล้ว");
		}
	});			
});
</script>

	  <TABLE cellSpacing=0 cellPadding=0 width=100% bgColor=#cccccc border=0>
              <TBODY>
              <TR>
                <TD>
                  <TABLE cellSpacing=1 cellPadding=1 border=0  width=100% >
                    <TBODY>
	  
<?php
		  		$sql2 = "SELECT * FROM job , job_res WHERE job.job_ID = job_res.job_ID and emp_ID ='$ss_empID'";

           		$result2 = mysql_query($sql2);
				#$row2=mysql_fetch_array($result2);
				
       
	
		
		
		while($row2=mysql_fetch_array($result2))
		{
			
		echo "<TR bgColor=#3C5F84 class=\"font_tdw\"  align=\"left\">";	
		echo "<input name=\"job[]\" type=\"hidden\" value=\"".$row2["jr_ID"]."\"/>";
		echo "<td>".$row2["job_detail"]."</td><td></td></tr>";
		
		
		echo "<tr><td>";
		[font=Verdana]echo "<table border='0' id=\"myTbl\">";
		echo "<tr id=\"firstTr\"><td align='left' ><textarea name=\"detail$row2[jr_ID][]\" id==\"detail$row2[jr_ID][]\" cols=\"70\" rows=\"1\"></textarea></td></tr></table>[/font]</td><td>";
		?>
		<button id="addRow" type="button">+</button>&nbsp;<button id="removeRow" type="button">-</button>
		<?php
		echo "</td></tr>";
		
		}
		?>
 <tr><td height="1" bgColor="#3C5F84" colspan="4"></td></tr>     
			 </TBODY></TABLE></TD></TR></TBODY></TABLE>