兼容 IE8

@@ -39,7 +39,11 @@ var errReporter = {
         });
     },
     init: function() {
-        window.onerror = this.writeError.bind(this);
+        var self = this;
+
+        window.onerror = function(msg, source, lineno, colno, error) {
+            self.writeError(msg, source, lineno, colno, error);
+        };
 
         // 上报未上报的事件
         this.reportError();