//ÏÔʾ³ÇÊÐ
function getCity(obj,province,city) {
	if (province==''){
		var e = document.getElementById(obj);
		e.innerHTML = "";
		e.options[0] = new Option(' ','');
		return false;
	}
	if (province<1){
		return false;
	}

	var xmlhttp = new XmlHttp();
	if (city==''){
		xmlhttp.response("../common/getdata.php?op=getcity&province="+province,"","showCity(xmlobj,'"+obj+"')");
	}else{
		xmlhttp.response("../common/getdata.php?op=getcity&province="+province,"","showCity(xmlobj,'"+obj+"',"+city+")");
	}
}

function showCity(obj,currentPos,city) {
	var arr_option = eval('(' + obj.responseText + ')');
	var e = document.getElementById(currentPos);	
	e.innerHTML = "";

	//debugger;
	for (var i=0;i<arr_option.length ;i++ ){
		e.options[i] = new Option(arr_option[i][1],arr_option[i][0]);
		if (city==arr_option[i][0]) {
			e.options[i].selected =  true;
		}
	}
}