function $(tag)
{
	if (document.getElementById(tag))
	{
		return document.getElementById(tag);
	}
	else if (document.all.tag)
	{
		return document.all.tag;
	}
	else
	{
		return false;
	}
}
function Show_Item(tag)
{
	switch (tag)
	{
	case 'date':
		ShowE($('show_date'));
		HiddenE($('show_sport'));
		HiddenE($('show_venue'));
		ShowE($('the_date'));
		HiddenE($('the_sport'));
		HiddenE($('the_venue'));
		break;
	case 'sport':
		HiddenE($('show_date'));
		ShowE($('show_sport'));
		HiddenE($('show_venue'));
		HiddenE($('the_date'));
		ShowE($('the_sport'));
		HiddenE($('the_venue'));
		break;
	case 'venue':
		HiddenE($('show_date'));
		HiddenE($('show_sport'));
		ShowE($('show_venue'));
		HiddenE($('the_date'));
		HiddenE($('the_sport'));
		ShowE($('the_venue'));
		break;
	}
}

function ShowE(tag)
{
	if (tag)
	{
		tag.style.display = "block";
	}
}
function HiddenE(tag)
{ 
	if (tag)
	{
		tag.style.display = "none";
	}
}
function Show_City(tag)
{
	HiddenE($('city_beijing'));
	HiddenE($('city_qingdao'));
	HiddenE($('city_hongkong'));
	HiddenE($('city_shanghai'));
	HiddenE($('city_tianjin'));
	HiddenE($('city_shenyang'));
	HiddenE($('city_qinhuangdao'));
	ShowE($(tag));
}