图中用到的图片：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta name="generator" content="PSPad editor, www.pspad.com"> <title></title> </head> <body> <style>input{border:1px solid #000;}.clear{clear:both;}.ehdel_upload_show input{float:left; margin-top:10px;}.ehdel_upload{float:left;margin-top:-20px; *margin-top:-40px; filter:alpha(opacity=0);-moz-opacity:0;opacity:0;}</style> <form method="post" action="" enctype="multipart/form-data"> <div> <input id="ehdel_upload_text" type="text" name="txt" /> <input id="ehdel_upload_btn" type="image" src="http://www.jb51.netdo/uploads/allimg/110503/1202250.gif" value="请选择文件" /> </div> <div></div> <input type="file" onchange="ehdel_upload_text.value=this.value" /></form></body></html>
提示：您可以先修改部分代码再运行