javascript图片无缝滚动特效

javascript图片无缝滚动特效753
//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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