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附件
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
.box {
width: 322px;
position: fixed;
bottom: 0;
right: 0;
overflow: hidden;
}
#closeButton {
position: absolute;
top: 0;
right: 0;
width: 24px;
height: 20px;
line-height:20px;
overflow:hidden;
cursor: pointer;
display:block;
color:#fff;
}
</style>
</head>
<body>
<div class="box" id="box">
<span id="closeButton">X</span>
<div class="hd" id="headPart">
<img src="images/t.jpg" alt=""/>
</div>
<div class="bd" id="bottomPart">
<img src="images/b.jpg" alt=""/>
</div>
</div>
<script>
var closeButton = document.getElementById("closeButton");
var bottomPart = document.getElementById("bottomPart");
closeButton.onclick = function () {
animate(bottomPart, {"height": 0}, function () {
animate(bottomPart.parentNode, {"width": 0});
});
}
function animate(obj, json, fn) {
clearInterval(obj.timer);
obj.timer = setInterval(function () {
//如果本次执行完成后 所有的属性都达到了目标值 就可以清理了
var flag = true;//假设所有的属性都达到了目标值
for (var k in json) {
var leader = parseInt(getStyle(obj, k)) || 0;
var target = json[k];
var step = (target - leader) / 10;
step = step > 0 ? Math.ceil(step) : Math.floor(step);
leader = leader + step;
obj.style[k] = leader + "px";
if (leader != target) {
flag = false;//告诉标记我还没达到
}
}
//到了这里还是true就说明 没有任何人告诉falg自己是false
//也就是说都达到了
if (flag) {
clearInterval(obj.timer);
if (fn) {
fn();//有回调函数才调用
}
}
}, 15);
}
function getStyle(obj, attr) {
if (obj.currentStyle) {
return obj.currentStyle[attr];
} else {
return window.getComputedStyle(obj, null)[attr];
}
}
</script>
</body>
</html>*
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