<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="jquery-2.1.4.min.js"></script>
<script type="text/javascript">
$(function(){
var fil=$("#fil");
$("<img>").insertAfter("input");
fil.bind('change',function(){
var fordate=new FormData();
var fils=$("#fil").get(0).files[0];
fordate.append('pic',fils);
var srcc=window.URL.createObjectURL(fils);
console.log(srcc);
$("img").attr({'src':srcc,'width':500+'px','heigth':500+'px'});
$.ajax({
url: "index4.php",
type: "post",
data: fordate,
processData : false,
contentType : false,
success: function(html){
console.log(html);
}
});
});
});
</script>
</head>
<body>
<input type="file" id="fil">
</body>原文：http://blog.csdn.net/xingjigongsi/article/details/46345961