// ===========自动滚屏============= function ScrollList(name){ this.list=document.getElementsByClassName(name)[0] this.prize_scroll=null var that=this this.list.addEventListener('mouseenter',function(){ clearInterval(that.prize_scroll) }) this.list.addEventListener('mouseleave',function(){ that.init() }) this.init=function(){ clearInterval(that.prize_scroll) that.prize_scroll=setInterval(function(){ that.list.scrollTop+=1 if(that.list.scrollTop==that.list.scrollHeight-that.list.offsetHeight){ that.list.scrollTop=0 } },100) } } var scroll1=new ScrollList('tcont')//tcont需要overflow:auto scroll1.init()