Topic awaiting preservation: XMLHttpRequest

<script type="text/javascript">

   function showUser(str) 
{ 
if (str=="") 
  { 
  document.getElementById("txtHint").innerHTML=""; 
  return; 
  }  
if (window.XMLHttpRequest) 
  {// code for IE7+, Firefox, Chrome, Opera, Safari 
  xmlhttp=new XMLHttpRequest(); 
  } 
else 
  {// code for IE6, IE5 
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); 
  } 
xmlhttp.onreadystatechange=function() 
  { 
  if (xmlhttp.readyState==4 && xmlhttp.status==200) 
    {var x=document.getElementById("co").value; 
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText; 
	
    } 
  } 
 
xmlhttp.open("GET","page2.php?q="+str+"&i="+x,true); 
xmlhttp.send(); 
} 

 </script>




page 1 - html - php




<form action='' name='InsertOrder'  method='post' >

Select Company:
<select name='CoDropDown[]' id='co'><?php
for ($i=0; $i < sizeof($Location['LocName']); $i++)
{
  echo "<option value='".$Location['SplitId'][$i]."'> ".$Location['LocName'][$i]."</option>";
 }?>
</select>


Equipment Type:
<select name='EquipTypeDropDown[]' id='equi' onchange="showUser(this.value)" ><?php
for ($i=0; $i < sizeof($EquipType['Equip']); $i++)
{
  echo "<option value='".$EquipType['Id'][$i]."'> ".$EquipType['Equip'][$i]."</option>";
 }?>
</select>
<span id='txtHint'>************&nbsp; &nbsp;</span><br><br>



page 2 


<?php

$ProdId=$_GET["q"];

$Id=$_GET["i"];
echo $ProdId."*----*".$Id;
 echo $_SERVER['QUERY_STRING']; 

?>