改变 input file 样式（input 文件域）是很多前端朋友经常遇到的头疼问题，今天推荐两种改变 input file 样式的两种常用方法：
方法一： <input type="text" size="20" name="upfile" id="upfile" style="border:1px dotted #ccc"> <input type="button" value="浏览" onclick="path.click()" style="border:1px solid #ccc;background:#fff"> <input type="file" id="path" style="display:none" onchange="upfile.value=this.value">
也可以写成这样： <style type="text/css"> <!-- #input1{border:1px solid #0000FF} #btn1{width:70px;height:21px;font-size:12px;padding-top:3px; background:url(83.gif) no-repeat; height:22px; border:0;} //--> </style>
<body><input type="text" id="input1"> <input name="button" type="button" id="btn1" onclick="myfile.click();" value="浏览文档" /> <input type="file" id="myfile" onchange="input1.value=this.value" style="display:none"> </body>
方法二： <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="content-type" content="application/xhtml+xml; charset=gb2312" /> <meta http-equiv="content-language" content="zh-cn" /> <meta name="robots" content="all" /> <meta name="keywords" content="关键字描述" /> <meta name="description" content="站点描述" /> <meta name="author" content="我们,we@126.com" /> <meta name="copyright" content="版权所有" /> <title>css+js定义input的file浏览按钮样式兼容FireFox</title> <style type="text/css"> <!-- *{ margin:0; padding:0; border:0;} body{font:12px/130% verdana,geneva,arial,helvetica,sans-serif,宋体; padding:20px;}li{list-style:none;} .clearfix:after{content:" ";display:block;height:0;clear:both;visibility:hidden;}.clearfix{*display:inline-block;} .text{ border:1px solid #999;height:16px; width:300px; font-family:verdana; font-size:12px;padding-top:2px; float:left;margin-right: 5px;} .file{ width:67px;overflow:hidden; background:url(83.gif); height:22px; *vertical-align:3px; overflow:hidden; float:left;} #file{ width:0; height:20px;margin-left: -154px;*margin-left:-3px; filter:alpha(opacity=0);-moz-opacity:.0;opacity:0.0; cursor:pointer;} --> </style> </head> <body> <input type="text" class="text" id="text"/> <span class="file"><input id="file" type="file" /></span> <script type="text/javascript"> <!-- var file = document.getElementById("file"); var text = document.getElementById("text"); file.onchange = type; function type() {text.value = file.value;} --> </script> </body> </html>