<script>
functionsetImagePreview(){
vardocObj=document.getElementById("doc");
varimgObjPreview=document.getElementById("preview");
if(docObj.files&&docObj.files[0]){
//火狐下,直接设img属性
imgObjPreview.style.display='block';
imgObjPreview.style.width='300px';
imgObjPreview.style.height='120px';
//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();
varimgSrc=document.selection.createRange().text;
varlocalImagId=document.getElementById("localImag");
//必须设置初始大小
localImagId.style.width="250px";
localImagId.style.height="200px";
//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!");
returnfalse;
}
imgObjPreview.style.display='none';
document.selection.empty();
}
returntrue;
}
</script>
<body>
<inputtype=filename="doc"id="doc"onchange="javascript:setImagePreview();">
<p><divid="localImag"><imgid="preview"width=-1height=-1style="diplay:none"/></div></p>
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