var county = [
   ["市区","长乐","福清","连江","罗源","闽侯","闽清","平潭","永泰"],
   ["市区","福安","福鼎","古田","屏南","霞浦","柘荣","寿宁","周宁"],
   ["市区","建宁","将乐","大田","明溪","宁化","清流","沙县","泰宁","永安","尤溪"],
   ["市区","邵武","顺昌","建阳","浦城","武夷山","光泽","松溪","政和","建瓯"],
   ["市区","长汀","永定","上杭","武平","漳平","连城"],
   ["市区","仙游"],
   ["市区","长泰","东山","华安","龙海","南靖","平和","云霄","漳浦","诏安"],
   ["市区","晋江","南安","石狮","惠安","安溪","永春","德化"],
   ["市区"],
   ["外省市"]
];
function get_county(){
	var loginForm = document.forms[1];
	var sltCity = loginForm.elements["city"];
	var sltCounty = loginForm.elements["county"];
	var preCounty = county[sltCity.selectedIndex-1];

	sltCounty.length = 1;
	for(var i=0;i<preCounty.length;i++){
		sltCounty[i+1] = new Option(preCounty[i],preCounty[i]);
	}
}