<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<div id="localImag">
<img id="preview" style="display:block; border:1px solid red; width: 150px; height: 180px;">
</div>
<input id="doc" type="file" name="file" onchange="javascript:setImagePreview();">
<script type="text/javascript">
//下面用于图片上传预览功能
function setImagePreview(avalue) {
var docObj=document.getElementById("doc");
var imgObjPreview=document.getElementById("preview");
if(docObj.files && docObj.files[0]){
imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);
}else{
//IE低版本下，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 = "150px";
localImagId.style.height = "180px";
//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();
}
}
</script>
</body>
原文地址：https://www.cnblogs.com/justSmile2/p/10034055.html
时间： 2024-10-12 20:44:27