<!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=gb2312" />
<title>无标题文档</title>
</head>
<script language="vbscript">
 sub go()
  location.href = document.f.se.value
 end sub
</script>
<body>
<form name="f" method="post">
<input type = "text ">
<select name="se" size="1">
 <option selected="selected">请选择</option>
 <option value="http://www.baidu.com">百度</option>
 <option value="http://www.>搜狐</option>
</select>
<input type="button" value="搜索" onclick="go()" />
</form>

</body>
</html>