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function getStyle(ele, attr) { if (ele.currentStyle) { return ele.currentStyle[attr]; } else { return getComputedStyle(ele, false)[attr]; } } function move(ele, obj, callback) { clearInterval(ele.timer); ele.timer = setInterval(function () { var a = true; for (var attr in obj) { if (attr == "opacity") { var start = getStyle(ele, attr) * 100; } else { var start = parseInt(getStyle(ele, attr)); } var speed = (obj[attr] - start) / 8; speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed); if (obj[attr] != start) { a = false; } if (attr == "opacity") { ele.style.opacity = (start + speed) / 100; ele.style.filter = "alpha(opacity=" + (start + speed)+ ")"; } else { ele.style[attr] = start + speed + "px"; } } if (a) { clearInterval(ele.timer); callback && callback(); } }, 30) }
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