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<!DOCTYPE html>
<html>
<head>
<title>javascript</title>
<meta type="viewport" content="width=device-width,initial-scale:1.0,user-scalable:no"/>
</head>
<body>
<input type="button" class="buttons" id="js_button" value="载入图片"/>
<div class="image_con js_imageCon" id="js_imageCon"></div>
</body>
<script type="text/javascript">
var button = document.getElementById("js_button");
button.onclick = function(){
var image = document.createElement("img");
image.onload = function(){
var w = this.width;
var h = this.height;
var p = w/h;
if(image.readyState=="complete"||image.readyState=="loaded"||image.complete){ //条件1,2是判断ie6-ie10;条件3是判断除ie6-ie10外的浏览器。
if(p>1){ //p>1 此条件可以按需修改
this.style.width = "300px";
this.style.height = "auto"; //切记要加，（只为跨过ie给img默认添加width和height属性坑这里的width和height的值是图片实际的尺寸），如果不加ie中会按照图片实际height显示，图会变形
}else{
this.style.width = "auto"; //同上
this.style.height = "180px";
}
//以下两行代码切记写到onload事件里边，避免谷歌中图片尺寸更改时过程的可见（由大变小，或由小变大）。
var imgCon = document.getElementById("js_imageCon");
imgCon.appendChild(image);
}
};
image.src = "images/image.jpg"
}
</script>
</html>标签：
原文地址：http://blog.csdn.net/ernijie/article/details/51360649
