var http_request = false; 

   function makeRequest(url) { 
		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) {}
         }
       } 
       http_request.onreadystatechange = alertContents; 
       http_request.open('GET', url, true); 
       http_request.send(null); 

   } 

   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('TB_ajaxContent').innerHTML = result; 
           } else { 
               //alert('There was a problem with the request.');
			   document.getElementById('TB_ajaxContent').innerHTML = 'There was a problem with the request.';
           } 
       } 
   }