javascript 联动

// JavaScript Document
var data = [
["请选择"],
["TEF考试","词汇语法","阅读听力","留学法国","教材资料","浪漫文化","玩转法国","其它问题"],
["TOPIK考试","会话听力","句型语法","词汇阅读","韩国留学","韩流文化","影视艺术","旅游信息","其它问题"],
["等级考试","留学日本","日语学习","教材资料","词法语法","影音动漫","东瀛文化","其它问题"],
["DELE考试","留学西班牙","西班牙语学习","资料教程","其它问题"],
["DSH考试","德语四级","词汇语法","听说读写","德国留学","德意志文化","教程资料","其它问题"],
["葡语考试","学习葡萄牙语","教程资料","留学葡萄牙","游历南美","其它问题"],
["学习考试","教材资料","文化交流","留学中东","其它问题"],
["PLIDA和CILS考试","意大利语学习","留学意大利","学习资料","意大利文化","其它问题"],
["ТЛРЯ考试","留学俄罗斯","俄语学习","俄罗斯文化","其他问题"],
["雅思考试","托福考试","出国留学","资料教程","英语学习","其它问题"],
["中文"],
["其它"]
];

var data_value = [
[""],
["TEF考试","词汇语法","阅读听力","留学法国","教材资料","浪漫文化","玩转法国","其它问题"],
["TOPIK考试","会话听力","句型语法","词汇阅读","韩国留学","韩流文化","影视艺术","旅游信息","其它问题"],
["等级考试","留学日本","日语学习","教材资料","词法语法","影音动漫","东瀛文化","其它问题"],
["DELE考试","留学西班牙","西班牙语学习","资料教程","其它问题"],
["DSH考试","德语四级","词汇语法","听说读写","德国留学","德意志文化","教程资料","其它问题"],
["葡语考试","学习葡萄牙语","教程资料","留学葡萄牙","游历南美","其它问题"],
["学习考试","教材资料","文化交流","留学中东","其它问题"],
["PLIDA和CILS考试","意大利语学习","留学意大利","学习资料","意大利文化","其它问题"],
["ТЛРЯ考试","留学俄罗斯","俄语学习","俄罗斯文化","其他问题"],
["雅思考试","托福考试","出国留学","资料教程","英语学习","其它问题"],
["中文"],
["其它"]
];

function change(x)
{
        var d = data[x];
  var d_v=data_value[x]
        with (document.getElementById("ud_6"))
  {
                length = 0;
                for(i=0;i<d.length;i++)
                        options[i] = new Option(d[i],d_v[i]);
        }
}

 <select id="types" name="types" onChange="change(this.selectedIndex);">
 <option value="">请选择分类</option>
 <option value="法语">法语</option>
 <option value="韩语">韩语</option>
 <option value="日语">日语</option>
 <option value="西班牙语">西班牙语</option>
 <option value="德语">德语</option>
 <option value="葡萄牙语">葡萄牙语</option>
 <option value="阿拉伯语">阿拉伯语</option>
 <option value="意大利语">意大利语</option>
 <option value="俄语">俄语</option>
 <option value="英语">英语</option>
 <option value="中文">中文</option>
 <option value="其它">其它</option>
 </select>　
 <select size="1" name="sordery" id="ud_6"><option>请选择</option></select>