var show_none = false;
var city_title,area_title;

function make_City(pro,chg,none){
	if( none && (none != 0 || none != "") ){
		switch(none){
			case 1:
				city_title = "== 縣市 ==";
				area_title = "== 全區 ==";
				break;
			case 2:
				city_title = "請選擇";
				area_title = "請選擇";
				break;
			default:
				city_title = "== 縣市 ==";
				area_title = "== 全區 ==";
				break;
		}
		pro.length = city.length + 1;
		pro.options[0].value = "";
		pro.options[0].text = city_title;
		pro.options[0].selected = true;
		for(var i=0; i<city.length; i++){
			pro.options[i+1].value = city[i];
			pro.options[i+1].text = city[i];
		}
		show_none = true;
	}else{
		pro.length = city.length;
		for(var i=0; i<city.length; i++){
			pro.options[i].value = city[i];
			pro.options[i].text = city[i];
		}
	}
	Sel_City(pro,chg);
}

function Sel_City(pro,chg){
	if( show_none ){
		if( pro.value == ""){
			chg.length = 1;
			chg.options[0].value = "";
			chg.options[0].text = area_title;
		}else{
			chg.length = area[pro.value].length + 1;
			chg.options[0].value = "";
			chg.options[0].text = area_title;
			
			for(var i=0;i < area[pro.value].length; i++){
				chg.options[i+1].value = area[pro.value][i];
				chg.options[i+1].text = area[pro.value][i];
			}
		}
	}else{
		chg.length = area[pro.value].length;
		
		for(var i=0;i < area[pro.value].length; i++){
			chg.options[i].value = area[pro.value][i];
			chg.options[i].text = area[pro.value][i];
		}
	}
}

function set_sel(obj,sel){
	for(var i=0; i < obj.options.length; i++){
		if( sel == obj.options[i].value )
			obj.options[i].selected = true;
	}
}