转自：http://canglang0.iteye.com/blog/1662268
<%@ page contentType="text/html;charset=UTF-8"%> <html> <head> <title>图片上传预览</title> <script> function PreviewImage(imgFile) { var pattern = /(\.*.jpg$)|(\.*.png$)|(\.*.jpeg$)|(\.*.gif$)|(\.*.bmp$)/; if(!pattern.test(imgFile.value)) { alert("系统仅支持jpg/jpeg/png/gif/bmp格式的照片！"); imgFile.focus(); } else { var path; if(document.all)//IE { imgFile.select(); path = document.selection.createRange().text; document.getElementById("imgPreview").innerHTML=""; document.getElementById("imgPreview").style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=‘true‘,sizingMethod=‘scale‘,src=\"" + path + "\")";//使用滤镜效果 } else//FF { path = URL.createObjectURL(imgFile.files[0]); document.getElementById("imgPreview").innerHTML = "<img src=‘"+path+"‘/>"; } } } </script> </head> <body> <center> <input type="file" onchange=‘PreviewImage(this)‘ /> <div id="imgPreview" style=‘width:500px; height:400px;‘> <img src=""/> </div> </center> </body> </html>
原文：http://www.cnblogs.com/hhls/p/5598670.html