添加自动播放方法（指定时间后，点击next）

@@ -30,9 +30,9 @@
         }
         }
 
 
         function autoClickNext(dom) {
         function autoClickNext(dom) {
-            var delaytime = delaytime in options ?  options.delaytime :
+            var delaytime = 'delaytime' in options ? options.delaytime :
                 $.fn.slider2.defaults.delaytime;
                 $.fn.slider2.defaults.delaytime;
-                
+
             timer = setInterval(function() {
             timer = setInterval(function() {
                 dom.find('.next').click();
                 dom.find('.next').click();
             }, delaytime);
             }, delaytime);