<!-- 要完成此效果把如下代码加入到<body>区域中 -->
<!-- http://www.knowsky.com -->
<!-- bbs http://www.knowsky.com/bbs-->
<script language="javascript">
<!--
function gothere(){
var thebox=document.mycombowopt
if (thebox.windowoption.checked){
if (!window.newwindow)
newwindow=window.open("")
newwindow.location=
thebox.example.options[thebox.example.selectedIndex].value
}
else
location=
thebox.example.options[thebox.example.selectedIndex].value
}
//-->
</script>
<form name="mycombowopt">
<select name="example" size=1>
<option value="http://www.163.com">网易</option>
<option value="http://www.sohu.com">搜狐</option>
<option value="http://www.sina.com.cn">新浪</option>
<option value="http://www.knowsky.com">本站</option>
</select> <input type="button" value="Go!" onClick="gothere()"> <br>
<input type="checkbox" name="windowoption" value="ON">新窗访问</p>
</form>