我有一个 JavaScript 的下拉选单问题请教各位帮忙解决

现在可以了！
<HTML>
<HEAD>
<META NAME="GENERATOR" Content="Microsoft Visual Studio 6.0">
<title>企业基本信息查询</title>
<link rel="stylesheet" href="../../css/css1.css" type="text/css">
<script language="Javascript">
<!--
function XCity(ci_conid,ci_tyid,ci_name)
{
    this.ciconid = ci_conid;
    this.cityid = ci_tyid;
    this.ciname = ci_name;
}var cities;
function initWin()
{
cities = new Array(20);
    cities[0] = new XCity('全部','全部','全部');
    cities[1] = new XCity('省外','全部','全部');
    cities[2] = new XCity('中央所属企业','全部','全部');
    cities[3] = new XCity('铁路系统所属企业','全部','全部');
    cities[4] = new XCity('省属企业','全部','全部');
    cities[4] = new XCity('成都','全部','全部');
    cities[5] = new XCity('成都','锦江区','锦江区');
    cities[6] = new XCity('成都','青羊区','青羊区');
    cities[7] = new XCity('成都','金牛区','金牛区');
    cities[8] = new XCity('成都','武候区','武候区');
    cities[9] = new XCity('成都','成华区','成华区');
    cities[10] = new XCity('成都','龙泉驿区','龙泉驿区');
    cities[11] = new XCity('成都','青白江区','青白江区');
    cities[12] = new XCity('成都','都江堰市','都江堰市');
    cities[13] = new XCity('成都','邛崃市','邛崃市');
    cities[14] = new XCity('成都','彭州市','彭州市');
    cities[15] = new XCity('成都','崇州市','崇州市');
    cities[16] = new XCity('成都','金堂县','金堂县');
    cities[17] = new XCity('成都','双流县','双流县');
    cities[18] = new XCity('成都','温江县','温江县');
    cities[19] = new XCity('成都','郫县','郫县');
    cities[20] = new XCity('成都','新都县','新都县');
    cities[21] = new XCity('成都','大邑县','大邑县');
    cities[22] = new XCity('成都','蒲江县','蒲江县');
    cities[23] = new XCity('成都','新津县','新津县');
    cities[24] = new XCity('自贡','全部','全部');
    cities[25] = new XCity('自贡','自流井区','自流井区');
    cities[26] = new XCity('自贡','贡井区','贡井区');
    cities[27] = new XCity('自贡','大安区','大安区');
    cities[28] = new XCity('自贡','沿滩区','沿滩区');
    cities[29] = new XCity('自贡','荣县','荣 县');
    cities[30] = new XCity('自贡','none','none');
    cities[31] = new XCity('攀枝花','全部','全部');
    cities[32] = new XCity('攀枝花','东区','东 区');
    cities[33] = new XCity('攀枝花','西区','西 区');
    cities[34] = new XCity('攀枝花','仁和区','仁和区');
    cities[35] = new XCity('攀枝花','米易县','米易县');
    cities[36] = new XCity('攀枝花','盐边县','盐边县');
    cities[37] = new XCity('泸州','全部','全部');
    cities[38] = new XCity('泸州','江阳区','江阳区');
    cities[39] = new XCity('泸州','龙马潭区','龙马潭区');
    cities[40] = new XCity('泸州','纳溪区','纳溪区');
    cities[41] = new XCity('泸州','泸县','泸 县');
    cities[42] = new XCity('泸州','合江县','合江县');
    cities[43] = new XCity('泸州','叙永县','叙永县');
    cities[44] = new XCity('泸州','古蔺县','古蔺县');
    cities[45] = new XCity('德阳','全部','全部');
    cities[46] = new XCity('德阳','旌阳区','旌阳区');
    cities[47] = new XCity('德阳','广汉市','广汉市');
    cities[48] = new XCity('德阳','什邡市','什邡市');
    cities[49] = new XCity('德阳','绵竹市','绵竹市');
    cities[50] = new XCity('德阳','中江县','中江县');
    cities[51] = new XCity('德阳','罗江县','罗江县');
    cities[52] = new XCity('绵阳','全部','全部');
    cities[53] = new XCity('绵阳','涪城区','涪城区');
    cities[54] = new XCity('绵阳','游仙区','游仙区');
    cities[55] = new XCity('绵阳','江油市','江油市');
    cities[56] = new XCity('绵阳','安县','安县');
    cities[57] = new XCity('绵阳','梓潼县','梓潼县');
    cities[58] = new XCity('绵阳','平武县','平武县');
    cities[59] = new XCity('绵阳','北川县','北川县');
    cities[60] = new XCity('绵阳','三台县','三台县');
    cities[61] = new XCity('绵阳','盐亭县','盐亭县');
    cities[62] = new XCity('广元','全部','全部');
    cities[63] = new XCity('广元','市中区','市中区');
    cities[64] = new XCity('广元','元坝区','元坝区');
    cities[65] = new XCity('广元','朝天区','朝天区');
    cities[66] = new XCity('广元','剑阁县','剑阁县');
    cities[67] = new XCity('广元','旺苍县','旺苍县');
    cities[68] = new XCity('广元','青川县','青川县');
    cities[69] = new XCity('广元','苍溪县','苍溪县');
    cities[70] = new XCity('遂宁','全部','全部');
    cities[71] = new XCity('遂宁','射洪县','射洪县');
    cities[72] = new XCity('遂宁','大英县','大英县');
    cities[73] = new XCity('遂宁','市中区','市中区');
    cities[74] = new XCity('遂宁','蓬溪县','蓬溪县');
    cities[75] = new XCity('内江','全部','全部');
    cities[76] = new XCity('内江','市中区','市中区');
    cities[77] = new XCity('内江','东兴区','东兴区');
    cities[78] = new XCity('内江','资中县','资中县');
    cities[79] = new XCity('内江','隆昌县','隆昌县');
    cities[80] = new XCity('内江','威远县','威远县');
    cities[81] = new XCity('资阳','全部','全部');
    cities[82] = new XCity('资阳','雁江区','雁江区');
    cities[83] = new XCity('资阳','简阳市','简阳市');
    cities[84] = new XCity('资阳','安岳县','安岳县');
    cities[85] = new XCity('资阳','乐至县','乐至县');
    cities[86] = new XCity('乐山','全部','全部');
    cities[87] = new XCity('乐山','市中区','市中区');
    cities[88] = new XCity('乐山','五通桥区','五通桥区');
    cities[89] = new XCity('乐山','沙湾区','沙湾区');
    cities[90] = new XCity('乐山','金河口区','金河口区');
    cities[91] = new XCity('乐山','峨眉山市','峨眉山市');
    cities[92] = new XCity('乐山','犍为县','犍为县');
    cities[93] = new XCity('乐山','井研县','井研县');
    cities[94] = new XCity('乐山','夹江县','夹江县');
    cities[95] = new XCity('乐山','沐川县','沐川县');
    cities[96] = new XCity('乐山','峨边县','峨边县');
    cities[97] = new XCity('乐山','马边县','马边县');
    cities[98] = new XCity('眉山','全部','全部');
    cities[99] = new XCity('眉山','东坡区','东坡区');
    cities[100] = new XCity('眉山','仁寿县','仁寿县');
    cities[101] = new XCity('眉山','彭山县','彭山县');
    cities[102] = new XCity('眉山','洪雅县','洪雅县');
    cities[103] = new XCity('眉山','丹棱','丹棱');
    cities[104] = new XCity('眉山','青神县','青神县');
    cities[105] = new XCity('南充','全部','全部');
    cities[106] = new XCity('南充','顺庆区','顺庆区');
    cities[107] = new XCity('南充','高坪区','高坪区');
    cities[108] = new XCity('南充','嘉陵区','嘉陵区');
    cities[109] = new XCity('南充','阆中市','阆中市');
    cities[110] = new XCity('南充','南部县','南部县');
    cities[111] = new XCity('南充','西充县','西充县');
    cities[112] = new XCity('南充','营山县','营山县');
    cities[113] = new XCity('南充','仪陇县','仪陇县');
    cities[114] = new XCity('南充','蓬安县','蓬安县');
    cities[115] = new XCity('宜宾','全部','全部');
    cities[116] = new XCity('宜宾','翠屏区','翠屏区');
    cities[117] = new XCity('宜宾','宜宾县','宜宾县');
    cities[118] = new XCity('宜宾','南溪县','南溪县');
    cities[119] = new XCity('宜宾','江安县','江安县');
    cities[120] = new XCity('宜宾','长宁县','长宁县');
    cities[121] = new XCity('宜宾','高县','高 县');
    cities[122] = new XCity('宜宾','筠连县','筠连县');
    cities[123] = new XCity('宜宾','珙县','珙县');
    cities[124] = new XCity('宜宾','兴文县','兴文县');
    cities[125] = new XCity('宜宾','屏山县','屏山县');
    cities[126] = new XCity('广安','全部','全部');
    cities[127] = new XCity('广安','广安区','广安区');
    cities[128] = new XCity('广安','邻水县','邻水县');
    cities[129] = new XCity('广安','华蓥市','华蓥市');
    cities[130] = new XCity('广安','岳池县','岳池县');
    cities[131] = new XCity('广安','武胜县','武胜县');
    cities[132] = new XCity('达川','全部','全部');
    cities[133] = new XCity('达川','通川区','通川区');
    cities[134] = new XCity('达川','通川区','通川区');
    cities[135] = new XCity('达川','达县','达县');
    cities[136] = new XCity('达川','宣汉县','宣汉县');
    cities[137] = new XCity('达川','开江县','开江县');
    cities[138] = new XCity('达川','大竹县','大竹县');
    cities[139] = new XCity('达川','渠县','渠 县');
    cities[140] = new XCity('巴中','全部','全部');
    cities[141] = new XCity('巴中','通江县','通江县');
    cities[142] = new XCity('巴中','南江县','南江县');
    cities[143] = new XCity('巴中','巴州区','巴州区');
    cities[144] = new XCity('巴中','平昌县','平昌县');
    cities[145] = new XCity('雅安','全部','全部');
    cities[146] = new XCity('雅安','雨城区','雨城区');
    cities[147] = new XCity('雅安','名山县','名山县');
    cities[148] = new XCity('雅安','荥经县','荥经县');
    cities[149] = new XCity('雅安','汉源县','汉源县');
    cities[150] = new XCity('雅安','石棉县','石棉县');
    cities[151] = new XCity('雅安','天全县','天全县');
    cities[152] = new XCity('雅安','芦山县','芦山县');
    cities[153] = new XCity('雅安','宝兴县','宝兴县');
    cities[154] = new XCity('阿坝','全部','全部');
    cities[155] = new XCity('阿坝','汶川县','汶川县');
    cities[156] = new XCity('阿坝','理县','理县');
    cities[157] = new XCity('阿坝','茂县','茂县');
    cities[158] = new XCity('阿坝','松潘县','松潘县');
    cities[159] = new XCity('阿坝','九寨沟县','九寨沟县');
    cities[160] = new XCity('阿坝','金川县','金川县');
    cities[161] = new XCity('阿坝','小金县','小金县');
    cities[162] = new XCity('阿坝','黑水县','黑水县');
    cities[163] = new XCity('阿坝','马尔康县','马尔康县');
    cities[164] = new XCity('阿坝','壤搪县','壤搪县');
    cities[165] = new XCity('阿坝','阿坝县','阿坝县');
    cities[166] = new XCity('阿坝','若尔盖县','若尔盖县');
    cities[167] = new XCity('阿坝','红原县','红原县');
    cities[168] = new XCity('甘孜','全部','全部');
    cities[169] = new XCity('甘孜','康定县','康定县');
    cities[170] = new XCity('甘孜','泸定县','泸定县');
    cities[171] = new XCity('甘孜','丹巴县','丹巴县');
    cities[172] = new XCity('甘孜','九龙县','九龙县');
    cities[173] = new XCity('甘孜','雅江县','雅江县');
    cities[174] = new XCity('甘孜','理塘县','理塘县');
    cities[175] = new XCity('甘孜','乡城县','乡城县');
    cities[176] = new XCity('甘孜','稻城县','稻城县');
    cities[177] = new XCity('甘孜','得荣县','得荣县');
    cities[178] = new XCity('甘孜','巴塘县','巴塘县');
    cities[179] = new XCity('甘孜','新龙县','新龙县');
    cities[180] = new XCity('甘孜','甘孜县','甘孜县');
    cities[181] = new XCity('甘孜','炉霍县','炉霍县');
    cities[182] = new XCity('甘孜','道孚县','道孚县');
    cities[183] = new XCity('甘孜','白玉县','白玉县');
    cities[184] = new XCity('甘孜','石渠县','石渠县');
    cities[185] = new XCity('甘孜','色达县','色达县');
    cities[186] = new XCity('甘孜','德格县','德格县');
    
    cities[187] = new XCity('凉山','全部','全部');
    
    cities[188] = new XCity('凉山','西昌市','西昌市');
    cities[189] = new XCity('凉山','德昌县','德昌县');
    cities[190] = new XCity('凉山','宁南县','宁南县');
    cities[191] = new XCity('凉山','会理县','会理县');
    cities[192] = new XCity('凉山','冕宁县','冕宁县');
    cities[193] = new XCity('凉山','会东县','会东县');
    cities[194] = new XCity('凉山','普格县','普格县');
    cities[195] = new XCity('凉山','昭觉县','昭觉县');
    cities[196] = new XCity('凉山','盐源县','盐源县');
    cities[197] = new XCity('凉山','木里县','木里县');
    cities[198] = new XCity('凉山','布拖县','布拖县');
    cities[199] = new XCity('凉山','美姑县','美姑县');
    cities[200] = new XCity('凉山','雷波县','雷波县');
    cities[201] = new XCity('凉山','喜德县','喜德县');
    cities[202] = new XCity('凉山','越西县','越西县');
    cities[203] = new XCity('凉山','甘洛县','甘洛县');
    cities[204] = new XCity('凉山','金阳县','金阳县');
country_onChange(document.all.sel_dq);
}function country_onChange(sel_dq)
{
    var city;
    var i;
    var oOption;    city = document.all.area;
    if (cities == null) 
        return;
    for (i=city.options.length-1;i>=0;i--)
    {
        city.options[i] = null;
    }
    for (i=0;i<cities.length;i++)
    {
  // alert (i)
        if (cities[i].ciconid == sel_dq.options[sel_dq.selectedIndex].value)
        {
        oOption = new Option();
        oOption.value = cities[i].cityid;
        oOption.text = cities[i].ciname;
        city.options[city.options.length] = oOption;
        }
    }
}-->
</script>
</HEAD>
<BODY language="javascript" onLoad="initWin()" bgcolor="#ffffff" leftmargin="0" topmargin="0">
<form name="frmSignon" action="qylist.asp" method="post" target="_blank" >
              <p> <font size="2"><b> 　类 别</b></font> <br>
                <select name="sel_lb">
                  <option value="全部" selected>全部</option>
                  <option value="B">建筑企业</option>
                  <option value="J">安装企业</option>
                  <option value="D">市政工程公司</option>
                  <option value="C">装饰装修企业</option>
                  <option value="K">路桥施工单位</option>
                  <option value="A">勘察设计单位</option>
                  <option value="H">工程建设监理单位</option>
                </select>
                <b><font size="2"><br>
                <br>
                企业所属地</font></b> 
                <select name=sel_dq  language="javascript" onChange="return country_onChange(this)">
                  <option value="全部" selected>全部</option>
                  <option value="省外">省外</option>
                  <option value="中央所属企业">中央所属企业</option>
                  <option value="铁路系统所属企业">铁路系统所属企业</option>
                  <option value="省属企业">省属企业</option>
                  <option value="成都">成都</option>
                  <option value="绵阳">绵阳</option>
                  <option value="资阳">资阳</option>
                  <option value="巴中">巴中</option>
                  <option value="乐山">乐山</option>
                  <option value="德阳">德阳</option>
                  <option value="达川">达川</option>
                  <option value="自贡">自贡</option>
                  <option value="遂宁">遂宁</option>
                  <option value="南充">南充</option>
                  <option value="凉山">凉山</option>
                  <option value="眉山">眉山</option>
                  <option value="宜宾">宜宾</option>
                  <option value="甘孜">甘孜</option>
                  <option value="泸州">泸州</option>
                  <option value="攀枝花">攀枝花</option>
                  <option value="广元">广元</option>
                  <option value="内江">内江</option>
                  <option value="雅安">雅安</option>
                  <option value="阿坝">阿坝</option>
                  <option value="广安">广安</option>
                </select>
                <b><font size="2"><br>
                <br>
                企业所属地</font></b><br>
                <select name=area>
                </select>
                <br>
                <br>
              <p><b><font size="2">资质等级</font></b> 
                <select name="sel_zzdj">
                  <option value="全部" selected>全部</option>
                  <option value="壹级">壹级</option>
                  <option value="贰级">贰级</option>
                  <option value="叁级">叁级</option>
                  <option value="肆级">肆级</option>
                </select>
                <br><br>
                <center>
                <input type=hidden name=he value=<%=he%>>
                  <input type="submit" name="查询" value="查询">
                </center>
              </p>
      </form>
</body>      
</html>