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jsp上傳圖片即時顯示效果代碼

2013-11-15 12:11:03  來源: JSP教程 

  <script> function setImagePreview() { var docObj=documentgetElementById("doc"); var imgObjPreview=documentgetElementById("preview"); if(docObjfiles && docObjfiles[]){ //火狐下直接設img屬性 imgObjPreviewstyledisplay = block; imgObjPreviewstylewidth = px; imgObjPreviewstyleheight = px; //imgObjPreviewsrc = docObjfiles[]getAsDataURL(); //火狐以上版本不能用上面的getAsDataURL()方式獲取需要一下方式 imgObjPreviewsrc = windowURLcreateObjectURL(docObjfiles[]); }else{ //IE下使用濾鏡 ocObjselect(); var imgSrc = documentselectioncreateRange()text; var localImagId = documentgetElementById("localImag"); //必須設置初始大小 localImagIdstylewidth = "px"; localImagIdstyleheight = "px"; //圖片異常的捕捉防止用戶修改後綴來偽造圖片 try{ localImagIdstylefilter= "progid:DXImageTransformMicrosoftAlphaImageLoader(sizingMethod=scale)"; localImagIdfiltersitem ("DXImageTransformMicrosoftAlphaImageLoader")src = imgSrc; }catch(e){ alert("您上傳的圖片格式不正確請重新選擇!"); return false; } imgObjPreviewstyledisplay = none; documentselectionempty(); } return true; } </script> <body> <input type=file name="doc" id="doc" onchange="javascript:setImagePreview();"> <p><div id="localImag"> <img id="preview" width= height= style="diplay:none" /> </div></p>


From:http://tw.wingwit.com/Article/program/Java/JSP/201311/20450.html
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