代码语言：javascript复制
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript" src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
$(".file").change(function(){
var fileImg = $(".fileImg");
var explorer = navigator.userAgent;
var imgSrc = $(this)[0].value;
if (explorer.indexOf('MSIE') >= 0) {
if (!/.(jpg|jpeg|png|JPG|PNG|JPEG)$/.test(imgSrc)) {
imgSrc = "";
fileImg.attr("src","/img/default.png");
return false;
}else{
fileImg.attr("src",imgSrc);
}
}else{
if (!/.(jpg|jpeg|png|JPG|PNG|JPEG)$/.test(imgSrc)) {
imgSrc = "";
fileImg.attr("src","/img/default.png");
return false;
}else{
var file = $(this)[0].files[0];
var url = URL.createObjectURL(file);
fileImg.attr("src",url);
}
}
})
})
</script>
</head>
<body>
<form enctype="multipart/form-date" method="post">
<input type="file" class="file">
<input type="submit" class="sub">
</form>
<img src="" class="fileImg">
</body>
</html> 
