var http_request = false;
   var lv_position;
   function makePOSTRequest(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml');
         }
      } 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;
//            el = document.getElementById('2breplaced');
//				el.innerHTML = result;            
//				alert( "result=" +result );
				var tmp = result.substr((result.indexOf('newvt="')+7));
				var newvt = tmp.substring( 0, tmp.indexOf('"') );
				var tmp = result.substr((result.indexOf('newwt="')+7));
				var newwt = tmp.substring( 0, tmp.indexOf('"') );
				var tmp = result.substr((result.indexOf('yourrating="')+12));
				var yourrating = tmp.substring( 0, tmp.indexOf('"') );
				
				if( yourrating >= 1 ){
					document.getElementById('current-rating'+lv_position).style.width = (newvt/newwt) * 25;
					document.getElementById('ratingcaption'+lv_position).innerHTML = "rating: " +(newvt/newwt).toFixed(2) + ", tu hai votato " +yourrating;
				}else
					alert('Per poter votare devi prima effettuare il login!');

/*
            if( el == null ) {
	            alert('IE uso Outer!');
					document.getElementById('2breplaced').outerHTML = result;            
				}else{
	            alert('Non è IE uso altro!');
					var range = document.createRange();
					range.selectNode(el);
					var docFrag = range.createContextualFragment(result);
					el.parentNode.replaceChild(docFrag, el) 
				}
*/
         } else {
            alert('There was a problem with the request.');
				result = http_request.responseText;
				alert( "result=" +result );
         }
      }
   }
   
   function ratethis(obj, rating, userid, position) {
      var poststr =	"ajax=true" 
					+	"&rating=" + rating 
					+	"&userid=" + userid ;
		lv_position = position;
      makePOSTRequest('/ajax/staff.aspx', poststr);
   }