<!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>JS获取图片大小和预览【兼容IE和其它浏览器】</title> </head> <script type="application/javascript"> function previewImage(oImage,preViewId){ if(!oImage.value.match(/.jpg|.jpeg|.gif|.png|.bmp/i)){ //alert('图片格式无效！'); return; } var imgPath = ""; if(document.all){ //低版本IE浏览器 oImage.select(); imgPath = document.selection.createRange().text; //使用滤镜效果 var tempValue = "progid:DXImageTransform.Microsoft.AlphaImageLoader(" tempValue += "enabled='true',sizingMethod='scale',src=\"" + imgPath + "\")"; document.getElementById(preViewId).style.filter = tempValue; }else{ //非IE浏览器，如火狐google等浏览器 imgPath = window.URL.createObjectURL(oImage.files[0]); //FF7.0以上 document.getElementById(preViewId).src = imgPath; //显示预览图 } }; function getFileSize(objFile){ var fileSize = objFile.fileSize || 0; if(fileSize == 0) { fileSize = objFile.files[0].size; } return fileSize; } function imageChange(){ var oImg = document.getElementById("imageFile01"); previewImage(oImg,"preview"); var fileSize = getFileSize(oImg); fileSize = Math.ceil(fileSize / 1024) + "KB"; var filePath =oImg.value; var agent = window.navigator.userAgent; var tempValue = "<br>File size: " + fileSize; tempValue += "<br>File path: " + filePath; tempValue += "<br>agent=" + agent; document.getElementById("imageInfo").innerHTML = tempValue; }; </script> <body> <h3>JS获取图片大小和预览【兼容IE和其它浏览器】</h3> <img /> <br> <input type="file" onchange="javascript:imageChange();" /> <br> <div></div> </body> </html>
运行效果图如下：
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《JavaScript图片操作技巧大全》、《JavaScript图形绘制技巧总结》、《JavaScript错误与调试技巧总结》、《JavaScript数据结构与算法技巧总结》、《JavaScript遍历算法与技巧总结》及《JavaScript数学运算用法总结》