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無刷新預覽所選擇的圖片示例代碼

 這篇文章主要介紹了無刷新預覽所選擇的圖片的具體實現,需要的朋友可以參考下

代碼如下   代碼如下: <!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>無標題文檔</title>  <script type="text/javascript">  //本地圖片預覽  function setImagePreview(fieldupload, image, imagediv) {  var docObj = document.getElementById(fieldupload);  var imgObjPreview = document.getElementById(image);  if (docObj.files && docObj.files[0]) {  //火狐下,直接設img屬性  imgObjPreview.style.display = 'block';  imgObjPreview.style.width = '150px';  imgObjPreview.style.height = '150px';  //imgObjPreview.src = docObj.files[0].getAsDataURL();  //火狐7以上版本不能用上面的getAsDataURL()方式獲取,需要一下方式  imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);  } else {  //IE下,使用濾鏡  docObj.select();  var imgSrc = document.selection.createRange().text;  var localImagId = document.getElementById(imagediv);  //必須設置初始大小  localImagId.style.width = "150px";  localImagId.style.height = "150px";  //圖片異常的捕捉,防止用戶修改後綴來偽造圖片  try {  localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)"; localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;  } catch (e) {  alert("您上傳的圖片格式不正確,請重新選擇!");  return false;  }  imgObjPreview.style.display = 'none';  document.selection.empty();  }  return true;  }  </script>  </head>    <body>  <div id="localImag"> <img id="preview" width="150px" height="150px" src="http://images.cnblogs.com/cnblogs_com/yc-755909659/559257/o_%e6%9a%82%e6%97%a0%e5%9b%be%e7%89%87.gif" alt="" /></div>  <div>  <input type="file" onchange="javascript:setImagePreview('upload','preview','localImag');" id="upload" />  </div>  </body>  </html> 
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