var http_host = 'api.school51.com';

//省市县联动选择：
var province_city_area = {
	cfg:{
		val_type:1,
		province_select_name:'select_province',
		city_select_name:'select_city',
		area_select_name:'select_area',
		province_val:'',
		city_val:'',
		area_val:''
	},
	
	//val_type：输出选项，1输出标识码，2输出汉字
	//province_select_name：省份下拉框名称
	//city_select_name：城市下拉框名称
	//area_select_name：县下拉框名称
	//province_val：省默认值
	//city_val：城市默认值
	//area_val：县默认值
	show:function(val_type,province_val,city_val,area_val,province_select_name,city_select_name,area_select_name,other_cfg){
		//存储传输值：
		if(val_type)province_city_area.cfg.val_type = val_type;
		if(province_select_name)province_city_area.cfg.province_select_name = province_select_name;
		if(city_select_name)province_city_area.cfg.city_select_name = city_select_name;
		if(area_select_name)province_city_area.cfg.area_select_name = area_select_name;
		if(province_val)province_city_area.cfg.province_val = province_val;
		if(city_val)province_city_area.cfg.city_val = city_val;
		if(area_val)province_city_area.cfg.area_val = area_val;
        
		//其他配置项：
        if(other_cfg){
        	$.each(other_cfg,function(key,val){
				province_city_area.cfg[key] = val;
			});
        }
		//下拉框样式：
		var select_class = 'select school_input';
		if(province_city_area.cfg['class']){
			select_class = province_city_area.cfg['class'];
		}
		//是否直接输出：
		var is_write = 1;
		if(province_city_area.cfg['write']){
			is_write = province_city_area.cfg['write'];
		}
		
		//输出DOM
		var _dom = ' <select name="' + province_city_area.cfg.province_select_name + '" id="' + province_city_area.cfg.province_select_name + '" onchange="province_city_area.change_province(false);" class="' + select_class + '"><option value="">请选择省</option></select>';
		_dom += ' <select name="' + province_city_area.cfg.city_select_name + '" id="' + province_city_area.cfg.city_select_name + '" onchange="province_city_area.change_city(false);" class="' + select_class + '"><option value="">请选择市</option></select>';
		
		if(province_city_area.cfg.area_select_name=="null"){
			var area_style = ' style="display:none;"';
			province_city_area.cfg.area_select_name = 'select_area';
		}else{
			var area_style = '';
		}
		_dom += ' <select name="' + province_city_area.cfg.area_select_name + '" id="' + province_city_area.cfg.area_select_name + '" class="' + select_class + '"' + area_style + '><option value="">请选择县</option></select>';
		
		if(is_write==1){
			document.write(_dom);
			province_city_area.load_province();
		}else{
			window.setTimeout(function(){
            	province_city_area.load_province();
            },200);
			return _dom;
		}
	},
    load_province:function(){
    	$.getJSON("http://" + http_host + "/hometown/get_province?jsoncallback=?",function(json){
			if(json.status==1){
				var select_html = "";
				select_html += '<option value="">请选择省</option>';
				for(var i = 0;i<json.data.length;i++){
					select_html += '<option value="' + (province_city_area.cfg.val_type==1?json.data[i].province_code:json.data[i].province) + '" province_code="' + json.data[i].province_code +'">' + json.data[i].province + '</option>';
				}
				$("#" + province_city_area.cfg.province_select_name).html(select_html);
				
				//如果有默认值，进行下面的触发：
				if(province_city_area.cfg.province_val){
					$("#"+province_city_area.cfg.province_select_name).val(province_city_area.cfg.province_val);
					province_city_area.change_province(true);
				}
			}
		});
    },
	change_province:function(is_val){
		var province_code = $("#"+province_city_area.cfg.province_select_name + " option:selected").attr('province_code');
		
		$.getJSON("http://" + http_host + "/hometown/get_city?jsoncallback=?",{"province_code":province_code},function(json){
			if(json.status==1){
				var select_html = "";
				select_html += '<option value="">请选择市</option>';
				for(var i = 0;i<json.data.length;i++){
					select_html += '<option value="' + (province_city_area.cfg.val_type==1?json.data[i].city_code:json.data[i].city) + '" city_code="' + json.data[i].city_code +'">' + json.data[i].city + '</option>';
				}
				$("#"+province_city_area.cfg.city_select_name).html(select_html);
				
				//如果有默认值，进行下面的触发：
				if(province_city_area.cfg.city_val&&is_val){
					$("#"+province_city_area.cfg.city_select_name).val(province_city_area.cfg.city_val);
					province_city_area.change_city(true);
				}else{
					$("#"+province_city_area.cfg.area_select_name).html('<option value="">请选择县</option>');
				}
			}
		});
	},
	change_city:function(is_val){
		var city_code = $("#"+province_city_area.cfg.city_select_name + " option:selected").attr('city_code');
		
		$.getJSON("http://" + http_host + "/hometown/get_area?jsoncallback=?",{"city_code":city_code},function(json){
			if(json.status==1){
				var select_html = "";
				select_html += '<option value="">请选择县</option>';
				for(var i = 0;i<json.data.length;i++){
					select_html += '<option value="' + (province_city_area.cfg.val_type==1?json.data[i].area_code:json.data[i].area) + '">' + json.data[i].area + '</option>';
				}
				$("#"+province_city_area.cfg.area_select_name).html(select_html);
				
				//如果有默认值，进行下面的触发：
				if(province_city_area.cfg.area_val&&is_val){
					$("#"+province_city_area.cfg.area_select_name).val(province_city_area.cfg.area_val);
				}
			}
		});
	}
};