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magnify.html
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magnify.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>模仿苹果手机放大效果</title>
<style type="text/css">
#div1{width:100%; position: fixed;bottom:20px;left:0;text-align:center;}
#div1 img{width:64px;}
</style>
</head>
<script type="text/javascript">
window.onload=function(){
var oDiv=document.getElementById("div1");
var aImg=oDiv.getElementsByTagName("img");
document.onmousemove=function(ev){
//因为鼠标是到可视区的距离，所以，我们应该获取鼠标到可视区的距离-元素到可视区的距离
var ev=ev || event;
for(var i=0;i<aImg.length;i++){
var b=Math.abs(ev.clientX-aImg[i].getBoundingClientRect().x-aImg[i].offsetWidth/2);
var a=Math.abs(ev.clientY-aImg[i].getBoundingClientRect().y-aImg[i].offsetHeight/2);
var c=Math.sqrt(a*a+b*b);
//getBoundingClientRect()是获取元素上下左右的值
if (c > 300) {
c = 300;
}
aImg[i].style.width = 128 - ( c * 0.2 ) + 'px';
}
}
}
</script>
<body>
<div id="div1">
<img src="img/magnify-img/1.png" />
<img src="img/magnify-img/2.png" />
<img src="img/magnify-img/3.png" />
<img src="img/magnify-img/4.png" />
<img src="img/magnify-img/5.png" />
</div>
</body>
</html>