query = mysql_query（ call prcSelectUsers （）跨度>）;


while（

r = mysql_fetch_array（

query））
{
echo < option>

Hi i want to select options (single or multiple) from a dropdown list and then have to copy the selected options to another dropdown list. This is my coding.

<td>
 <select name="drpUsers" multiple="multiple" style="height:100;width:100">
 <?php
 	include "dbConnection.php";
	$query=mysql_query("call prcSelectUsers()");
	
	
	while($r=mysql_fetch_array($query))
	{
		echo "<option>".$r['vchUserName'];
		echo "</option>";
		
	}
  ?>
   
 </select>
 
 </td>

function add()
{
var b=document.getElementById('drpUsers').value;
alert(b);


}

This add() function is called in onclick of a button but variable b returns null how to do this? Pls help

query=mysql_query("call prcSelectUsers()"); while(

r=mysql_fetch_array(

query)) { echo "<option>".