图片上传时实现在本地预览 1. [代码] [JavaScript]代码 !DOCTYPE htmlhtml lang="en"head meta http-equiv="Content-Type" content="text/html; charset=utf-8" / titleBy：DragonDean/title style .file{ height: 103px; width: 103px; pos
1. [代码][JavaScript]代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>By：DragonDean</title>
<style>
.file{
height: 103px;
width: 103px;
position: relative;
display: inline-block;
overflow: hidden;
/*// color: red;*/
text-decoration: none;
text-indent: 0;
line-height: 20px;
border:none;
}
.file input{
height: 110px;
width: 110px;
position: absolute;
font-size: 100px;
right: 0;
top: 0;
opacity: 0;
z-index: 999;
}
.file img{
position: absolute;
/*border-radius: 100%;*/
height: 100px;
left: 1px;
width: 100px;
right: 0;
top: 0;
border: none;
}
</style>
<script type="text/javascript">
//下面用于图片上传预览功能
function setImagePreview(avalue) {
var docObj=document.getElementById("upload");
var imgObjPreview=document.getElementById("pic");
if(docObj.files &&docObj.files[0])
{
//火狐下，直接设img属性
console.log(docObj.files[0]);
console.log(docObj.value);
imgObjPreview.style.display = 'block';
//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
console.log("not IE");
console.log(window.URL.createObjectURL(docObj.value));
console.log(window.URL.createObjectURL(docObj.files[0]));
imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);
}
else
{
//IE下，使用滤镜
console.log("IE");
docObj.select();
var imgSrc = document.selection.createRange().text;
var localImagId = document.getElementById("localImag");
//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;
}
</script>
</head>
<body>
<a href="javascript:;" class="file" id="localImag">
<input type="file" name="" id="upload" onchange="setImagePreview(this.value,'pic')">
<img src="./image/spare.png" id="pic">
</a>
</body>
</html>