xx

js/common2.js

@@ -53,14 +53,22 @@ function $ajax(opt) {
 		}
 		xmlHttp.onreadystatechange = function() {
 			var res;
-			if(xmlHttp.readyState == 4 && xmlHttp.status == 200) {
-				res = xmlHttp.responseText;
+			if(this.readyState != 4)return;
+			
+			if( this.status == 200 || this.status == 304) {
+				res = this.responseText;
 				if(opt.dataType == 'json') {
 					res = JSON.parse(res);
 				}
 				resolve(res);
+			} else {
+				reject(new Error(this.statusText));
 			}
 		};
+		
+		xmlHttp.onerror = function() {
+	      reject(new Error(this.statusText));
+	    };
 	})
 }