function changeExpoCity(obj)
{
	if(obj.options.length>0 && obj.selectedIndex > -1)
	{
		var val = obj.options[obj.selectedIndex].value;
		if(val!=null && val!="")
			AjaxPost("../expo/ChangeCity.aspx","city="+val,getChangeResp);
	}
}

function getChangeResp(re)
{
	if(re==null)
	{
		return;
	}
	if(re.indexOf("ok!")>-1)
	{
		window.location.reload();
	}
}