<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv = "Content-Type" content="text/html;charset=gb2312"/>
<title> 图片放大缩小</title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<style>
.one{width:90px;height:100px}
</style>
<script language="javascript">
window.onload=function(){
var img1 = document.getElementsByTagName("img")[0];
//火狐和IE兼容的获得元素属性
/*function getsize(obj,att){
if(document.all){
return obj.currentStyle[att];
}
else{
return getComputedStyle(obj,att)[att];
}
}
alert(getsize(img1,"width"));
*/
//火狐和IE兼容的获得鼠标滚轮信息
if(img1.addEventListener){
img1.onmousewheel = scrollfun;
img1.addEventListener("DOMMouseScroll",scrollfun,false);
}
function scrollfun (e){
var ev= e || window.event;//兼容分别为IE和火狐
var num=ev.wheelDelta||ev.detail;//兼容分别为IE和火狐
//alert(num);
if((num== -3 || num ==120) && img1.offsetWidth < 900){
img1.style.width = (img1.offsetWidth)*1.2 +"px";
img1.style.height = (img1.offsetHeight)*1.2 +"px";
}
else if((num ==3 || num ==-120) && img1.offsetWidth >60){
img1.style.width =(img1.offsetWidth)/1.2 + "px";
img1.style.height = (img1.offsetHeight)/1.2+ "px";
}
}
}
</script>
</head>
<!--"D:/Myfile/图片/1.jpg"-->
<body>
<img src="file:///D|/1.jpg" class="one"/>
</body>
</html>
