上传图片 显示图片
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html> 3 <head> 4 <title></title> 5 </head> 6 <body> 7 <div id="divPreview"> 8 <img id="imgHeadPhoto" src="noperson.jpg" style=" 160px; height: 170px; border: solid 1px #d2e2e2;" alt="" /> 9 </div> 10 <input type="file" onchange="PreviewImage(this,'imgHeadPhoto','divPreview')" size="20"/> 11 12 <script type="text/javascript"> 13 //js本地图片预览，兼容ie[6-9]、火狐、Chrome17+、Opera11+、Maxthon3 14 function PreviewImage(fileObj,imgPreviewId,divPreviewId){ 15 var allowExtention=".jpg,.bmp,.gif,.png";//允许上传文件的后缀名document.getElementById("hfAllowPicSuffix").value; 16 var extention=fileObj.value.substring(fileObj.value.lastIndexOf(".")+1).toLowerCase(); 17 var browserVersion= window.navigator.userAgent.toUpperCase(); 18 if(allowExtention.indexOf(extention)>-1){ 19 if(fileObj.files){//HTML5实现预览，兼容chrome、火狐7+等 20 if(window.FileReader){ 21 var reader = new FileReader(); 22 reader.onload = function(e){ 23 document.getElementById(imgPreviewId).setAttribute("src",e.target.result); 24 } 25 reader.readAsDataURL(fileObj.files[0]); 26 }else if(browserVersion.indexOf("SAFARI")>-1){ 27 alert("不支持Safari6.0以下浏览器的图片预览!"); 28 } 29 }else if (browserVersion.indexOf("MSIE")>-1){ 30 if(browserVersion.indexOf("MSIE 6")>-1){//ie6 31 document.getElementById(imgPreviewId).setAttribute("src",fileObj.value); 32 }else{//ie[7-9] 33 fileObj.select(); 34 if(browserVersion.indexOf("MSIE 9")>-1) 35 fileObj.blur();//不加上document.selection.createRange().text在ie9会拒绝访问 36 var newPreview =document.getElementById(divPreviewId+"New"); 37 if(newPreview==null){ 38 newPreview =document.createElement("div"); 39 newPreview.setAttribute("id",divPreviewId+"New"); 40 newPreview.style.width = document.getElementById(imgPreviewId).width+"px"; 41 newPreview.style.height = document.getElementById(imgPreviewId).height+"px"; 42 newPreview.style.border="solid 1px #d2e2e2"; 43 } 44 newPreview.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale',src='" + document.selection.createRange().text + "')"; 45 var tempDivPreview=document.getElementById(divPreviewId); 46 tempDivPreview.parentNode.insertBefore(newPreview,tempDivPreview); 47 tempDivPreview.style.display="none"; 48 } 49 }else if(browserVersion.indexOf("FIREFOX")>-1){//firefox 50 var firefoxVersion= parseFloat(browserVersion.toLowerCase().match(/firefox/([d.]+)/)[1]); 51 if(firefoxVersion<7){//firefox7以下版本 52 document.getElementById(imgPreviewId).setAttribute("src",fileObj.files[0].getAsDataURL()); 53 }else{//firefox7.0+ 54 document.getElementById(imgPreviewId).setAttribute("src",window.URL.createObjectURL(fileObj.files[0])); 55 } 56 }else{ 57 document.getElementById(imgPreviewId).setAttribute("src",fileObj.value); 58 } 59 }else{ 60 alert("仅支持"+allowExtention+"为后缀名的文件!"); 61 fileObj.value="";//清空选中文件 62 if(browserVersion.indexOf("MSIE")>-1){ 63 fileObj.select(); 64 document.selection.clear(); 65 } 66 fileObj.outerHTML=fileObj.outerHTML; 67 } 68 } 69 </script> 70 </body> 71 </html>