html代码
<input type="file" name="file" ?id="file" >
<img src="" ?id="img">
js代码
$("#file").bind("change",function(){ ???????????var url = null; ???????????if(window.createObjectURL != undefined) { ???????????????url = window.createObjectURL(this.files[0]); ???????????} else if(window.URL != undefined) { ???????????????url = window.URL.createObjectURL(this.files[0]); ???????????} else if(window.webkitURL != undefined) { ???????????????url = window.webkitURL.createObjectURL(this.files[0]); ???????????} ???????????$("#img").attr("src",url); ???????})input预览上传图片
原文地址：http://www.cnblogs.com/blogs-8888/p/7567459.html