removed SACK warning for older browsers #369

Older Browsers (Opera) got a warning from the new AJAX stuff. It's a bug
in SACK described at
http://twilightuniverse.com/2005/05/sack-of-ajax/#comment-594
I just removed it from tw-sack.js

I also added the line suggested at
http://twilightuniverse.com/2005/05/sack-of-ajax/#comment-597 - not
used yet but may come in handy

darcs-hash:20050604185143-9977f-921b8c8ad4f11a867b8c2df26c37158cc7368608.gz

tw-sack.js

@@ -76,6 +76,7 @@ function sack(file){
 					break;
 					case 4: // Completed.
 						self.response = self.xmlhttp.responseText
+            self.responseXML = self.xmlhttp.responseXML;
 						self.onCompletion();
 						if(self.execute){ self.runResponse(); }
 						if (self.elementObj) { 
@@ -87,5 +88,5 @@ function sack(file){
 		}
 	};
 this.createAJAX();
-if(this.failed && this.AjaxFailedAlert){ alert(this.AjaxFailedAlert); }
+//if(this.failed && this.AjaxFailedAlert){ alert(this.AjaxFailedAlert); }
 }