標籤：count func rip cup csharp img margin nbsp border
<!DOCTYPE html><html><head><meta charset="UTF-8"><title></title><style type="text/css">*{padding: 0;margin: 0;}.wrap{width: 512px;height: 400px;border: 3px solid #808080;position: relative;overflow: hidden;margin: 100px auto;}.wrap span{width: 100%;height: 200px;position: absolute;}.up{top: 0;}.down{bottom: 0;}img{position: absolute;top: 0;left: 0;}</style></head><body><div id="box" class="wrap"><img src="images/mi.png"/ id="xiaomi"><span class="up" id="picUp"></span><span class="down" id="picDown"></span></div></body><script type="text/javascript">var up = document.getElementById(‘picUp‘);var down = document.getElementById(‘picDown‘);var img = document.getElementById(‘xiaomi‘)var count = 0;var time = null;//滑鼠移入的時候吧up.onmouseover = function(){//不管怎樣 上來先清定時器clearInterval(time);time = setInterval(function(){count-=3;count >= -1070 ? img.style.top = count + ‘px‘: clearInterval(time); },30)}down.onmouseover = function(){clearInterval(time)time = setInterval(function(){count+=1;count < 0 ? img.style.top = count + ‘px‘: clearInterval(time); },30)}</script></html>
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