How do you call an ASHX from JavaScript?

Question

I want to call an ASHX file and pass some query string variables from JavaScript and get the return string into a string in the JavaScript. How would I do this?

The ASHX file is already coded to response.write a string based on whatever the query strings are.

Answer 1

Something like this?:

function createXMLHttpRequest() {
   try { return new XMLHttpRequest(); } catch(e) {}
   try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) {}
   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
   alert("XMLHttpRequest not supported");
   return null;
 }

var xmlHttpReq= createXMLHttpRequest();
xmlHttpReq.open("GET", "your.ashx?v1=1&v2=2&etc", false);
xmlHttpReq.send(null);
var yourJSString = xmlHttpReq.responseText;