var bindEvent = {    'add':function(id,type,fn,isBubble){      var dom = document.getElementById(id);      if(!isBubble) isBubble=false;      if(dom.addEventListenner){        dom.addEventListenner(type,fn,isBubble);      }else if(dom.attachEvent){        Transit = function(){          fn.call(dom);        }        dom.attachEvent('on'+type,Transit);      }else{        dom['on'+type] = fn;      }    },    'remove':function(id,type,fn,isBubble){      var dom = document.getElementById(id);      if(!isBubble) isBubble=false;      if(dom.removeEventListenner){        dom.removeEventListenner(type,fn,isBubble)      }else if(dom.detachEvent){        dom.detachEvent('on'+type,Transit)      }else{        dom['on'+type]=null;      }    }  }

//定義事件處理程序 function msg(){  alert(this.tagName) } //為目標(biāo)元素綁定事件 bindEvent.add('link','click',msg,false); //解除目標(biāo)元素綁定的事件 bindEvent.remove('link','click',msg,false);