/**********************************
Title:   AJAX TRY AND CATCH
Version: 1.0
Author:  Demetrio L. Cochon Jr.
Email:   demetrio.cochon@gmail.com
Description: determine if a browser can perform an ajax call and return xmlHttp Request if available else pop-up an alert message for the user.
**********************************/
/*------------------------------------
		  AJAX TRY AND CATCH 
------------------------------------*/
function tryAndcatch() {
  var xmlHttp;
  try   {
	  // Firefox, Opera 8.0+, Safari
	  xmlHttp=new XMLHttpRequest();
  } catch (e) {
  	// Internet Explorer
  try  {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  } catch (e) {
    try { 
		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    } catch (e) {
      alert("Your browser does not support AJAX!");
      return false;
	  }
  	}
  }
  return xmlHttp;
}