Pass string generated by ajax call?

[webguy262]

I have a form that generates a part number based upon a series of selection boxes.

 

http://brinsterinc.com/east/inventory_test.php

 

I want to pass the part number as a hidden field in a second form that I am going to add to the page. That form will email the part number along with name, email address, etc.

 

How can I access the part number so that it can be passed as an invisible field?

 

The code that displays the part number is...

 

<span name="myspan" id="myspan" style="border:1px solid #000000; padding:2px;"></span>

 

and the ajax script is...

 

<script type="text/javascript" language="javascript">
   var http_request = false;
   function makePOSTRequest(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = alertContents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById('myspan').innerHTML = result;            
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function get(obj) {
      var poststr = "s=" + document.getElementById("s").value + "&it=" + document.getElementById("it").value + "&id=" + document.getElementById("id").value + "&ot=" + document.getElementById("ot").value + "&od=" +  document.getElementById("od").value + "&l=" + document.getElementById("l").value ;makePOSTRequest('post.php', poststr);
   }

</script>