JS浏览器有关问题还是代码有关问题

JS浏览器问题还是代码问题？

   

       function CLASS_MSN_MESSAGE(id,width,height,caption,title,message,target,action){   

          this.id       = id;   

          this.title    = title;   

          this.caption = caption;   

          this.message = message;   

          this.target   = target;   

          this.action   = action;   

          this.width    = width?width:200;   

          this.height   = height?height:120;   

          this.timeout = 150;   

          this.speed    = 20;   

          this.step     = 1;   

          this.right    = screen.width -1;   

          this.bottom   = screen.height;   

          this.left     = this.right - this.width;   

          this.top      = this.bottom - this.height;   

          this.timer    = 0;   

          this.pause    = false;  

          this.close    = false;  

          this.autoHide = true;  

       }   

        

       /**  

       * 隐藏消息方法   

       */   

       CLASS_MSN_MESSAGE.prototype.hide = function(){   

          if(this.onunload()){   

              var offset = this.height>this.bottom-this.top?this.height:this.bottom-this.top;   

              var me = this;   

              if(this.timer>0){     

                  window.clearInterval(me.timer);   

              }   

        

              var fun = function(){  

                  if(me.pause==false||me.close){  

                      var x = me.left;   

                      var y = 0;   

                      var width = me.width;   

                      var height = 0;   

                      if(me.offset>0){   

                          height = me.offset;   

                      }   

                      y = me.bottom - height;   

                      if(y>=me.bottom){   

                          window.clearInterval(me.timer);