点击<select>的选项跳到相应网页

<select id="d1"><option value="http://www.baidu.com/">百度</option><option value="http://www.taobao.com/">淘宝</option><option value="http://www.csdn.net/">CSDN</option></select>

 var d1=document.getElementById("d1");        d1.onchange=function(){        window.location.href=this.value;        }