A script on this page is causing Internet Explorer run slow

hi
im using combobox for loading data from db,when im executing my code in IE im getting this error message.

its working fine with Mozilla and chrome aswell.

var temp_arr = new Array(); function doInitGrid() { var fac_id=$("#cbo_fac_id").val(); $.ajax({ async:true, type:"POST", data:"fac_id="+fac_id, url:"filename.php", success:function(msg) { if(msg!='') { var job=msg.split("#"); for(var i=0;i<job.length;i++) { var arr=job[i].split("~"); mygrid.getCombo(1).put(arr[0],arr[1]);//arr[0]->value, arr[1]->Label temp_arr[arr[0]]=arr[1]; } } } });

the data of combobox

<?php
$fac_id=$_POST['fac_id'];
$emp_name="select emp_code,first_name from tbla_emp where facility_id='$fac_id'  order by first_name";
$rs=$conn->Execute($emp_name);
$b="";
while(!$rs->EOF)
 {
    if($b=="")
	    $b=$rs->fields[0]."~".$rs->fields[1];
    else
		$b.="#".$rs->fields[0]."~".$rs->fields[1];
	$rs->MoveNext();
 }
 echo $b;
?>