个回答

• iicoom成功人士

  2016-08-20 15:32:17

  已采纳

  都不知到老师那个怎么运行的，我照他写的就是动不了，直到看到你这个：

  function bind(eventType,callback,false){

      if(typeof el.addEventListener === "function"){

             el.addEventListener(eventType, callback,false);

          }else if(typeof el.attachEvent === "function"){

             el.attachEvent("on" + eventType,callback);

              }

      }

  呵呵，bind里边我传了eventType,callback,false后来可以了

  0

• 极客教程

  2015-12-08 02:03:12

  个人博客:www.cllgeek.com

  1

• 极客教程

  2015-12-08 02:02:16

  window.onload=function(){

  function bind(el,eventType, callback){

      if(typeof el.addEventListener === "function"){

             el.addEventListener(eventType, callback,false);

          }else if(typeof el.attachEvent === "function"){

             el.attachEvent("on" + eventType,callback);

              }

      }

       

  function mouseoverHandler(e){

      var target = e.target || e.srcElement;

     

      var list = document.getElementsByTagName("li");

       

      for(var i = 0; i < list.length; i++){

          list[i].className = "";

          }

       

         while(target.tagName != "LI" && target.tagName != "BODY"){

               target = target.parentNode;

             } 

         target.className = "big";

       

      }

   

   

  function initList(){

       

      var list = document.getElementsByTagName("li");

      for(var i=0; i < list.length; i++){

           bind(list[i],"mouseover", mouseoverHandler);

         }

      }

  
  

  initList();

  }

  
  

  2