<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>select</title>
<script type="text/javascript">
</script>
</head>
<body id="body">
<select onchange="alert(this.options[this.selectedIndex].value);">
<option value="1">a</option>
<option>b</option>
<option>c</option>
</select>
</body>
</html>
上面是个demo
javascript:document.getElementById(‘reny‘).value=this.options[this.selectedIndex].innerHTML; 这是取选项的html
原文：http://my.oschina.net/u/1865857/blog/300894