如下所示：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script type="text/javascript">
function selChange(){
var sel=document.getElementById('sel');
alert(sel.options[sel.selectedIndex].text);
alert(sel.options[sel.selectedIndex].value);
}
</script>
</head>
<body>
<select id="sel" onchange="selChange()" >
<option value="zhangsan">张三</option>
<option value="lisi" >李四</option>
<option value="wangwu" >王五</option>
</select>
</body>
</html>