<Meta charset="UTF-8">

属性absolute/relative $(function(){ var oul = $('.wrap ul'); var oulHtml = oul.html(); oul.html(oulHtml+oulHtml) var timeId = null; var ali = $('.wrap ul li'); var aliWidth = ali.eq(0).width(); var aliSize = ali.size(); var ulWidth = aliWidth*aliSize; oul.width(ulWidth); //1600px var speed = 2; function slider(){ if(speed<0){ if(oul.css('left')==-ulWidth/2+'px'){ oul.css('left',0); } oul.css('left','+=-2px'); } if(speed>0){ if(oul.css('left')=='0px'){ oul.css('left',-ulWidth/2+'px'); } oul.css('left','+='+speed+'px'); } } // setInterval()函数的作用是：每隔一段时间，执行该函数里的代码 timeId = setInterval(slider,30); $('.wrap').mouSEOver(function(){ // clearInterval()函数的作用是用来清除定时器 clearInterval(timeId); }); $('.wrap').mouSEOut(function(){ timeId = setInterval(slider,30); }); $('.goLeft').click(function(){ speed=-2; }); $('.goRight').click(function(){ speed=2; }); });