Js二级菜单连动效果，选省挑市
<form name="companyForm" action="" method="post"> 所属省份： <select id="shengid" name="shengid" onChange="changelocation(document.companyForm.shengid.options[document.companyForm.shengid.selectedIndex].value)" > <option selected="selected" value="0">请选择省份</option> <option value="2">北京市</option> <option value="1">安徽省</option> <option value="3">山东省</option> <option value="4">江苏省</option> <option selected value="5">上海市</option> <option value="6">广东省</option> <option value="7">浙江省</option> <option value="8">福建省</option> <option value="9">重庆市</option> <option value="10">甘肃省</option> <option value="11">广西</option> <option value="12">贵州省</option> <option value="13">海南省</option> <option value="14">河北省</option> <option value="15">河南省</option> <option value="16">黑龙江省</option> <option value="17">湖北省</option> <option value="18">湖南省</option> <option value="19">江西省</option> <option value="20">吉林省</option> <option value="21">辽宁省</option> <option value="22">内蒙古</option> <option value="23">宁夏</option> <option value="24">青海省</option> <option value="25">山西省</option> <option value="26">陕西省</option> <option value="27">四川省</option> <option value="28">天津市</option> <option value="29">新疆</option> <option value="30">西藏</option> <option value="31">云南省</option> <option value="32">香港</option> <option value="33">澳门</option> <option value="34">台湾</option> <option value="35">国外与其它</option> </select> 所属城市： <select id="Select1" name="shiid" style="width: 140px;"> <option></option> </select></form>
<script Language="JavaScript"><!-- var onecount; onecount=0; subcat = new Array(); subcat[0] = new Array("玉树藏族自治州","24","430"); subcat[1] = new Array("台湾","34","429"); subcat[2] = new Array("卢湾区","5","428"); subcat[3] = new Array("西宁市","24","427"); subcat[4] = new Array("金山区","5","424"); subcat[5] = new Array("虹口区","5","423"); subcat[6] = new Array("南汇区","5","422"); subcat[7] = new Array("闵行区","5","421"); subcat[8] = new Array("静安区","5","420"); subcat[9] = new Array("嘉定区","5","419"); subcat[10] = new Array("闸北区","5","418"); subcat[11] = new Array("杨浦区","5","417"); subcat[12] = new Array("徐汇区","5","416"); subcat[13] = new Array("松江区","5","415"); subcat[14] = new Array("青浦区","5","414"); subcat[15] = new Array("普陀区","5","413"); subcat[16] = new Array("浦东区","5","412"); subcat[17] = new Array("黄浦区","5","411"); subcat[18] = new Array("奉贤区","5","410"); subcat[19] = new Array("崇明区","5","409"); subcat[20] = new Array("长宁区","5","408"); subcat[21] = new Array("宝山区","5","407"); subcat[22] = new Array("西城区","2","406"); subcat[23] = new Array("通州区","2","405"); subcat[24] = new Array("顺义区","2","404"); subcat[25] = new Array("石景山区","2","403"); subcat[26] = new Array("平谷区","2","402"); subcat[27] = new Array("密云区","2","401"); subcat[28] = new Array("怀柔区","2","400"); subcat[29] = new Array("丰台区","2","399"); subcat[30] = new Array("房山区","2","398"); subcat[31] = new Array("东城区","2","397"); subcat[32] = new Array("大兴区","2","396"); subcat[33] = new Array("崇文区","2","395"); subcat[34] = new Array("朝阳区","2","394"); subcat[35] = new Array("昌平区","2","393"); subcat[36] = new Array("海淀区","2","392"); subcat[37] = new Array("周口市","15","391"); subcat[38] = new Array("蓟 县","28","384"); subcat[39] = new Array("静海县","28","383"); subcat[40] = new Array("宁河县","28","382"); subcat[41] = new Array("宝坻区","28","381"); subcat[42] = new Array("武清区","28","380"); subcat[43] = new Array("北辰区","28","379"); subcat[44] = new Array("津南区","28","378"); subcat[45] = new Array("西青区","28","377"); subcat[46] = new Array("东丽区","28","376"); subcat[47] = new Array("大港区","28","375"); subcat[48] = new Array("汉沽区","28","374"); subcat[49] = new Array("塘沽区","28","373"); subcat[50] = new Array("红桥区","28","372"); subcat[51] = new Array("河北区","28","371"); subcat[52] = new Array("南开区","28","370"); subcat[53] = new Array("河西区","28","369"); subcat[54] = new Array("河东区","28","368"); subcat[55] = new Array("和平区","28","367"); subcat[56] = new Array("天门市","17","365"); subcat[57] = new Array("潜江市","17","364"); subcat[58] = new Array("仙桃市","17","363"); subcat[59] = new Array("中卫市","23","362"); subcat[60] = new Array("儋州市","13","361"); subcat[61] = new Array("东方市","13","360"); subcat[62] = new Array("五指山市","13","359"); subcat[63] = new Array("万宁市","13","358"); subcat[64] = new Array("琼海市","13","357"); subcat[65] = new Array("文昌市","13","356"); subcat[66] = new Array("南川区","9","355"); subcat[67] = new Array("万川区","9","354"); subcat[68] = new Array("济源市","15","353"); subcat[69] = new Array("鄂尔多斯","22","352"); subcat[70] = new Array("通辽","22","351"); subcat[71] = new Array("随州市","17","350"); subcat[72] = new Array("甘孜藏族自治州","27","349"); subcat[73] = new Array("资阳市","27","348"); subcat[74] = new Array("国外与其它","35","347"); subcat[75] = new Array("澳门","33","345"); subcat[76] = new Array("香港","32","344"); subcat[77] = new Array("昭通市","31","343"); subcat[78] = new Array("玉溪市","31","342"); subcat[79] = new Array("红河哈尼族彝族自治州","31","341"); subcat[80] = new Array("文山壮族苗族自治州","31","340"); subcat[81] = new Array("西双版纳傣族自治州","31","339"); subcat[82] = new Array("曲靖市","31","337"); subcat[83] = new Array("怒江傈僳族自治州","31","336"); subcat[84] = new Array("丽江市","31","335"); subcat[85] = new Array("临沧市","31","334"); subcat[86] = new Array("楚雄彝族自治州","31","333"); subcat[87] = new Array("迪庆藏族自治州","31","332"); subcat[88] = new Array("德宏傣族景颇族自治州","31","331"); subcat[89] = new Array("保山市","31","330"); subcat[90] = new Array("东川市","31","329"); subcat[91] = new Array("大理白族自治州","31","328"); subcat[92] = new Array("昆明市","31","327"); subcat[93] = new Array("日喀则地区","30","326"); subcat[94] = new Array("山南地区","30","325"); subcat[95] = new Array("那曲地区","30","324"); subcat[96] = new Array("林芝地区","30","323"); subcat[97] = new Array("昌都地区","30","322"); subcat[98] = new Array("阿里地区","30","321"); subcat[99] = new Array("拉萨市","30","320"); subcat[100] = new Array("石河子市","29","319"); subcat[101] = new Array("伊犁哈萨克自治州","29","318"); subcat[102] = new Array("和田地区","29","316"); subcat[103] = new Array("吐鲁番地区","29","315"); subcat[104] = new Array("塔城地区","29","314"); subcat[105] = new Array("昌吉回族自治州","29","313"); subcat[106] = new Array("博尔塔拉蒙古自治州","29","312"); subcat[107] = new Array("哈密地区","29","311"); subcat[108] = new Array("巴音郭楞蒙古自治州","29","310"); subcat[109] = new Array("阿勒泰地区","29","309"); subcat[110] = new Array("阿克苏地区","29","308"); subcat[111] = new Array("克拉玛依市","29","307"); subcat[112] = new Array("克孜勒苏柯尔克孜自治州","29","306"); subcat[113] = new Array("喀什地区","29","305"); subcat[114] = new Array("乌鲁木齐市","29","304"); subcat[115] = new Array("天津市","28","303"); subcat[116] = new Array("宜宾市","27","302"); subcat[117] = new Array("雅安市","27","301"); subcat[118] = new Array("遂宁市","27","300"); subcat[119] = new Array("绵阳市","27","299"); subcat[120] = new Array("泸州市","27","298"); subcat[121] = new Array("内江市","27","297"); subcat[122] = new Array("南充市","27","296"); subcat[123] = new Array("攀枝花市","27","295"); subcat[124] = new Array("乐山市","27","294"); subcat[125] = new Array("凉山彝族自治州","27","293"); subcat[126] = new Array("广元市","27","292"); subcat[127] = new Array("广安市","27","291"); subcat[128] = new Array("德阳市","27","290"); subcat[129] = new Array("巴中市","27","289"); subcat[130] = new Array("阿坝藏族羌族自治州","27","288"); subcat[131] = new Array("自贡市","27","287"); subcat[132] = new Array("眉山市","27","286"); subcat[133] = new Array("达州市","27","285"); subcat[134] = new Array("成都市","27","284"); subcat[135] = new Array("榆林市","26","283"); subcat[136] = new Array("汉中市","26","282"); subcat[137] = new Array("延安市","26","281"); subcat[138] = new Array("咸阳市","26","280"); subcat[139] = new Array("渭南市","26","279"); subcat[140] = new Array("铜川市","26","278"); subcat[141] = new Array("商洛市","26","277"); subcat[142] = new Array("安康市","26","276"); subcat[143] = new Array("宝鸡市","26","275"); subcat[144] = new Array("西安市","26","274"); subcat[145] = new Array("运城市","25","273"); subcat[146] = new Array("阳泉市","25","272"); subcat[147] = new Array("朔州市","25","271"); subcat[148] = new Array("忻州市","25","270"); subcat[149] = new Array("吕梁市","25","269"); subcat[150] = new Array("临汾市","25","268"); subcat[151] = new Array("长治市","25","267"); subcat[152] = new Array("晋中市","25","266"); subcat[153] = new Array("晋城市","25","265"); subcat[154] = new Array("大同市","25","264"); subcat[155] = new Array("太原市","25","263"); subcat[156] = new Array("海西蒙古族藏族自治州","24","262"); subcat[157] = new Array("果洛藏族自治州","24","261"); subcat[158] = new Array("黄南藏族自治州","24","260"); subcat[159] = new Array("海北藏族自治州","24","259"); subcat[160] = new Array("海南藏族自治州","24","258"); subcat[161] = new Array("海东地区","24","257"); subcat[162] = new Array("吴忠市","23","255"); subcat[163] = new Array("石嘴山市","23","254"); subcat[164] = new Array("固原市","23","253"); subcat[165] = new Array("银川市","23","252"); subcat[166] = new Array("哲里木盟","22","251"); subcat[167] = new Array("伊克昭盟","22","250"); subcat[168] = new Array("呼伦贝尔盟","22","249"); subcat[169] = new Array("锡林郭勒盟","22","248"); subcat[170] = new Array("乌海市","22","247"); subcat[171] = new Array("乌兰察布盟","22","246"); subcat[172] = new Array("兴安盟","22","245"); subcat[173] = new Array("赤峰市","22","244"); subcat[174] = new Array("包头市","22","243"); subcat[175] = new Array("巴彦淖尔盟","22","242"); subcat[176] = new Array("阿拉善盟","22","241"); subcat[177] = new Array("呼和浩特市","22","240"); subcat[178] = new Array("葫芦岛市","21","239"); subcat[179] = new Array("营口市","21","238"); subcat[180] = new Array("铁岭市","21","237"); subcat[181] = new Array("盘锦市","21","236"); subcat[182] = new Array("辽阳市","21","235"); subcat[183] = new Array("朝阳市","21","234"); subcat[184] = new Array("锦州市","21","233"); subcat[185] = new Array("丹东市","21","232"); subcat[186] = new Array("鞍山市","21","231"); subcat[187] = new Array("本溪市","21","230"); subcat[188] = new Array("抚顺市","21","229"); subcat[189] = new Array("阜新市","21","228"); subcat[190] = new Array("大连市","21","227"); subcat[191] = new Array("沈阳市","21","226"); subcat[192] = new Array("延边朝鲜族自治州","20","225"); subcat[193] = new Array("通化市","20","224"); subcat[194] = new Array("松原市","20","223"); subcat[195] = new Array("四平市","20","222"); subcat[196] = new Array("辽源市","20","221"); subcat[197] = new Array("吉林市","20","220"); subcat[198] = new Array("白山市","20","219"); subcat[199] = new Array("白城市","20","218"); subcat[200] = new Array("长春市","20","217"); subcat[201] = new Array("宜春市","19","216"); subcat[202] = new Array("鹰潭市","19","215"); subcat[203] = new Array("上饶市","19","214"); subcat[204] = new Array("新余市","19","213"); subcat[205] = new Array("萍乡市","19","212"); subcat[206] = new Array("九江市","19","211"); subcat[207] = new Array("景德镇市","19","210"); subcat[208] = new Array("吉安市","19","209"); subcat[209] = new Array("赣州市","19","208"); subcat[210] = new Array("抚州市","19","207"); subcat[211] = new Array("南昌市","19","206"); subcat[212] = new Array("张家界市","18","205"); subcat[213] = new Array("株洲市","18","204"); subcat[214] = new Array("岳阳市","18","203"); subcat[215] = new Array("益阳市","18","202"); subcat[216] = new Array("永州市","18","201"); subcat[217] = new Array("衡阳市","18","200"); subcat[218] = new Array("湘西土家族苗族自治州","18","199"); subcat[219] = new Array("湘潭市","18","198"); subcat[220] = new Array("邵阳市","18","197"); subcat[221] = new Array("娄底市","18","196"); subcat[222] = new Array("常德市","18","195"); subcat[223] = new Array("郴州市","18","194"); subcat[224] = new Array("怀化市","18","193"); subcat[225] = new Array("长沙市","18","192"); subcat[226] = new Array("宜昌市","17","191"); subcat[227] = new Array("咸宁市","17","190"); subcat[228] = new Array("襄樊市","17","189"); subcat[229] = new Array("十堰市","17","188"); subcat[230] = new Array("孝感市","17","187"); subcat[231] = new Array("荆州市","17","186"); subcat[232] = new Array("荆门市","17","185"); subcat[233] = new Array("鄂州市","17","184"); subcat[234] = new Array("恩施土家族苗族自治州","17","183"); subcat[235] = new Array("黄石市","17","182"); subcat[236] = new Array("黄冈市","17","181"); subcat[237] = new Array("武汉市","17","180"); subcat[238] = new Array("伊春市","16","179"); subcat[239] = new Array("黑河市","16","178"); subcat[240] = new Array("鹤岗市","16","177"); subcat[241] = new Array("绥化市","16","175"); subcat[242] = new Array("双鸭山市","16","174"); subcat[243] = new Array("七台河市","16","173"); subcat[244] = new Array("齐齐哈尔市","16","172"); subcat[245] = new Array("牡丹江市","16","171"); subcat[246] = new Array("佳木斯市","16","170"); subcat[247] = new Array("鸡西市","16","169"); subcat[248] = new Array("大兴安岭地区","16","168"); subcat[249] = new Array("大庆市","16","167"); subcat[250] = new Array("哈尔滨市","16","166"); subcat[251] = new Array("鹤壁市","15","164"); subcat[252] = new Array("三门峡市","15","163"); subcat[253] = new Array("商丘市","15","162"); subcat[254] = new Array("许昌市","15","161"); subcat[255] = new Array("信阳市","15","160"); subcat[256] = new Array("新乡市","15","159"); subcat[257] = new Array("平顶山市","15","158"); subcat[258] = new Array("南阳市","15","157"); subcat[259] = new Array("漯河市","15","156"); subcat[260] = new Array("濮阳市","15","155"); subcat[261] = new Array("洛阳市","15","154"); subcat[262] = new Array("焦作市","15","153"); subcat[263] = new Array("安阳市","15","152"); subcat[264] = new Array("驻马店市","15","151"); subcat[265] = new Array("开封市","15","150"); subcat[266] = new Array("郑州市","15","149"); subcat[267] = new Array("衡水市","14","148"); subcat[268] = new Array("唐山市","14","147"); subcat[269] = new Array("秦皇岛市","14","146"); subcat[270] = new Array("廊坊市","14","145"); subcat[271] = new Array("承德市","14","144"); subcat[272] = new Array("沧州市","14","143"); subcat[273] = new Array("张家口市","14","142"); subcat[274] = new Array("保定市","14","141"); subcat[275] = new Array("邢台市","14","140"); subcat[276] = new Array("邯郸市","14","139"); subcat[277] = new Array("石家庄市","14","138"); subcat[278] = new Array("海口市","13","137"); subcat[279] = new Array("三亚市","13","136"); subcat[280] = new Array("铜仁地区","12","135"); subcat[281] = new Array("黔西南布依族苗族自治州","12","134"); subcat[282] = new Array("黔南布依族苗族自治州","12","133"); subcat[283] = new Array("黔东南苗族侗族自治州","12","132"); subcat[284] = new Array("六盘水市","12","131"); subcat[285] = new Array("安顺市","12","130"); subcat[286] = new Array("遵义市","12","129"); subcat[287] = new Array("毕节地区","12","128"); subcat[288] = new Array("贵阳市","12","127"); subcat[289] = new Array("贵港市","11","126"); subcat[290] = new Array("玉林市","11","125"); subcat[291] = new Array("河池市","11","124"); subcat[292] = new Array("梧州市","11","123"); subcat[293] = new Array("来宾市","11","122"); subcat[294] = new Array("钦州市","11","121"); subcat[295] = new Array("崇左市","11","120"); subcat[296] = new Array("柳州市","11","119"); subcat[297] = new Array("贺州市","11","118"); subcat[298] = new Array("桂林市","11","117"); subcat[299] = new Array("百色市","11","115"); subcat[300] = new Array("北海市","11","114"); subcat[301] = new Array("防城港市","11","113"); subcat[302] = new Array("南宁市","11","112"); subcat[303] = new Array("张掖市","10","111"); subcat[304] = new Array("武威市","10","110"); subcat[305] = new Array("天水市","10","109"); subcat[306] = new Array("庆阳市","10","108"); subcat[307] = new Array("平凉市","10","107"); subcat[308] = new Array("陇南市","10","106"); subcat[309] = new Array("临夏回族自治州","10","105"); subcat[310] = new Array("酒泉市","10","104"); subcat[311] = new Array("金昌市","10","103"); subcat[312] = new Array("嘉峪关市","10","102"); subcat[313] = new Array("白银市","10","101"); subcat[314] = new Array("定西市","10","100"); subcat[315] = new Array("甘南藏族自治州","10","99"); subcat[316] = new Array("兰州市","10","98"); subcat[317] = new Array("万县市","9","97"); subcat[318] = new Array("黔江地区","9","96"); subcat[319] = new Array("涪陵市","9","95"); subcat[320] = new Array("重庆市","9","94"); subcat[321] = new Array("漳州市","8","93"); subcat[322] = new Array("厦门市","8","92"); subcat[323] = new Array("三明市","8","91"); subcat[324] = new Array("泉州市","8","90"); subcat[325] = new Array("莆田市","8","89"); subcat[326] = new Array("宁德市","8","88"); subcat[327] = new Array("南平市","8","87"); subcat[328] = new Array("龙岩市","8","86"); subcat[329] = new Array("福州市","8","85"); subcat[330] = new Array("湖州市","7","84"); subcat[331] = new Array("舟山市","7","83"); subcat[332] = new Array("温州市","7","82"); subcat[333] = new Array("台州市","7","81"); subcat[334] = new Array("绍兴市","7","80"); subcat[335] = new Array("宁波市","7","79"); subcat[336] = new Array("丽水市","7","78"); subcat[337] = new Array("衢州市","7","77"); subcat[338] = new Array("金华市","7","76"); subcat[339] = new Array("嘉兴市","7","75"); subcat[340] = new Array("杭州市","7","74"); subcat[341] = new Array("江门市","6","73"); subcat[342] = new Array("肇庆市","6","72"); subcat[343] = new Array("湛江市","6","71"); subcat[344] = new Array("珠海市","6","70"); subcat[345] = new Array("中山市","6","69"); subcat[346] = new Array("云浮市","6","68"); subcat[347] = new Array("河源市","6","67"); subcat[348] = new Array("阳江市","6","66"); subcat[349] = new Array("韶关市","6","65"); subcat[350] = new Array("深圳市","6","64"); subcat[351] = new Array("汕尾市","6","63"); subcat[352] = new Array("汕头市","6","62"); subcat[353] = new Array("清远市","6","61"); subcat[354] = new Array("梅州市","6","60"); subcat[355] = new Array("茂名市","6","59"); subcat[356] = new Array("潮州市","6","58"); subcat[357] = new Array("揭阳市","6","57"); subcat[358] = new Array("江门市","6","56"); subcat[359] = new Array("东莞市","6","55"); subcat[360] = new Array("惠州市","6","54"); subcat[361] = new Array("佛山市","6","53"); subcat[362] = new Array("广州市","6","52"); subcat[363] = new Array("上海市","5","51"); subcat[364] = new Array("南京市","4","50"); subcat[365] = new Array("泰州市","4","49"); subcat[366] = new Array("镇江市","4","48"); subcat[367] = new Array("扬州市","4","47"); subcat[368] = new Array("盐城市","4","46"); subcat[369] = new Array("无锡市","4","45"); subcat[370] = new Array("苏州市","4","44"); subcat[371] = new Array("徐州市","4","43"); subcat[372] = new Array("南通市","4","42"); subcat[373] = new Array("连云港市","4","41"); subcat[374] = new Array("常州市","4","40"); subcat[375] = new Array("淮安市","4","39"); subcat[376] = new Array("南京市","4","38"); subcat[377] = new Array("枣庄市","3","37"); subcat[378] = new Array("菏泽市","3","36"); subcat[379] = new Array("烟台市","3","35"); subcat[380] = new Array("潍坊市","3","34"); subcat[381] = new Array("泰安市","3","33"); subcat[382] = new Array("威海市","3","32"); subcat[383] = new Array("日照市","3","31"); subcat[384] = new Array("青岛市","3","30"); subcat[385] = new Array("莱芜市","3","29"); subcat[386] = new Array("临沂市","3","28"); subcat[387] = new Array("聊城市","3","27"); subcat[388] = new Array("济宁市","3","26"); subcat[389] = new Array("德州市","3","25"); subcat[390] = new Array("淄博市","3","24"); subcat[391] = new Array("滨州市","3","23"); subcat[392] = new Array("东营市","3","22"); subcat[393] = new Array("济南市","3","21"); subcat[394] = new Array("亳州市","1","20"); subcat[395] = new Array("铜陵市","1","19"); subcat[396] = new Array("六安市","1","18"); subcat[397] = new Array("黄山市","1","17"); subcat[398] = new Array("淮北市","1","16"); subcat[399] = new Array("阜阳市","1","15"); subcat[400] = new Array("蚌埠市","1","13"); subcat[401] = new Array("宣城市","1","12"); subcat[402] = new Array("宿州市","1","11"); subcat[403] = new Array("马鞍山市","1","10"); subcat[404] = new Array("淮南市","1","9"); subcat[405] = new Array("滁州市","1","8"); subcat[406] = new Array("巢湖市","1","7"); subcat[407] = new Array("安庆市","1","6"); subcat[408] = new Array("北京市","2","4"); subcat[409] = new Array("芜湖市","1","2"); subcat[410] = new Array("合肥市","1","1"); onecount =411; function changelocation(locationid) { document.companyForm.shiid.length = 0; document.companyForm.shiid.options[0]=new Option('请选择城市','0'); var locationid=locationid; var i; for (i=0;i < onecount; i++) { if (subcat[i][1] == locationid) { document.companyForm.shiid.options[document.companyForm.shiid.length] = new Option(subcat[i][0], subcat[i][2]); } } } function search(){ var iForm = document.all.companyForm; var sheng = Trim(iForm.elements['shengid'].value); var shi = Trim(iForm.elements['shiid'].value); var key = Trim(iForm.elements['key'].value); var sql="/website/wdcx.jsp"; if(sheng!=""){ sql=sql+"?sheng="+sheng; } if(shi!=""){ sql=sql+"&shi="+shi; } if(key!=""){ sql = sql+"&key="+key; } iForm.action=sql; iForm.submit(); }//--></script>