<form action="http://website.com/attachFileAJAX.do" method="post" enctype ="multipart/form-data" > <input id="File1" name="UpLoadFile" type="file" /> <input type="submit" name="Button1" value="Button" id="Button1" /> </form>
原文：http://www.cnblogs.com/iamlehaha/p/6599911.html