图片不间断滚动图片不间断滚动四种不同方式 marquee 图片不间断循环滚动代码向上： var speed=30 demo2.innerHTML=demo1.innerHTML function Marquee() if(demo2.offsetTop-demo.scrollTop 向下： var speed=30 demo2.innerHTML=demo1.innerHTML demo.scrollTop=demo.scrollHeight function Marquee() if(demo1.offsetTop-demo.scrollTop=0) demo.scrollTop+=demo2.offsetHeight else demo.scrollTop- var MyMar=setInterval(Marquee,speed) demo.onmouseover=function() clearInterval(MyMar) demo.onmouseout=function() MyMar=setInterval(Marquee,speed) 向左： var speed=20/速度数值越大速度越慢,demo2.offsetWidth=demo1.offsetWidth=固定值demo2left.innerHTML=demo1left.innerHTMLfunction Marquee()if(demo2left.offsetWidth-demoleft.scrollLeft向右： var speed=30 demo2.innerHTML=demo1.innerHTML demo.scrollLeft=demo.scrollWidth function Marquee() if(demo.scrollLeft