HTML 代码如下
<body> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tbody> <tr> <td height="101" align="center"> <div id="localImag" style="border: 1px solid red;"> <img id="preview" src="" width="100" height="100" style="display: block;border: 1px solid blue;" /> </div> </td> </tr> <tr> <td align="center" style="padding-top:10px;"> <form method="get" action="xznetwork" name="textfile"> <input type="file" name="file" id="doc" multiple="multiple" style="150px;" onchange="javascript:setImagePreview();"> </form> </td> </tr> </tbody> </table> </body>
JavaScript 代码如下 //下面用于图片上传预览功能 function setImagePreview(avalue) { //input var docObj = document.getElementById("doc"); //img var imgObjPreview = document.getElementById("preview"); //div var divs = document.getElementById("localImag"); if (docObj.files && docObj.files[0]) { //火狐下，直接设img属性 imgObjPreview.style.display = 'block'; imgObjPreview.style.width = '100px'; imgObjPreview.style.height = '100px'; //imgObjPreview.src = docObj.files[0].getAsDataURL(); //火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式 imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]); } else { //IE下，使用滤镜 docObj.select(); var imgSrc = document.selection.createRange().text; var localImagId = document.getElementById("localImag"); //必须设置初始大小 localImagId.style.width = "100px"; localImagId.style.height = "100px"; //图片异常的捕捉，防止用户修改后缀来伪造图片 try { localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)"; localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc; } catch(e) { alert("您上传的图片格式不正确，请重新选择!"); return false; } imgObjPreview.style.display = 'none'; document.selection.empty(); } return true; }