javascript图片无缝滚动特效

//js无缝滚动代码 function marquee(i, direction) { var obj = document.getElementById("marquee" + i); var obj1 = document.getElementById("marquee" + i + "_1"); var obj2 = document.getElementById("marquee" + i + "_2"); if (direction == "up") { if (obj2.offsetTop - obj.scrollTop <= 0) { obj.scrollTop -= (obj1.offsetHeight + 20); } else { var tmp = obj.scrollTop; obj.scrollTop++; if (obj.scrollTop == tmp) { obj.scrollTop = 1; } } } else { if (obj2.offsetWidth - obj.scrollLeft <= 0) { obj.scrollLeft -= obj1.offsetWidth; } else { obj.scrollLeft++; } } } function marqueeStart(i, direction) { var obj = document.getElementById("marquee" + i); var obj1 = document.getElementById("marquee" + i + "_1"); var obj2 = document.getElementById("marquee" + i + "_2"); obj2.innerHTML = obj1.innerHTML; var marqueeVar = window.setInterval("marquee(" + i + ", '" + direction + "')", 20); obj.onmouseover = function() { window.clearInterval(marqueeVar); } obj.onmouseout = function() { marqueeVar = window.setInterval("marquee(" + i + ", '" + direction + "')", 20); } }

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