var speed=30//速度数值越大速度越慢 jsweb8_cn_left2.innerHTML=jsweb8_cn_left1.innerHTML function Marquee3(){ if(jsweb8_cn_left2.offsetWidth-jsweb8_cn_left.scrollLeft<=0) jsweb8_cn_left.scrollLeft-=jsweb8_cn_left1.offsetWidth else{ jsweb8_cn_left.scrollLeft++ } } var MyMar3=setInterval(Marquee3,speed) jsweb8_cn_left.onmouseover=function() {clearInterval(MyMar3)} jsweb8_cn_left.onmouseout=function() {MyMar3=setInterval(Marquee3,speed)}