function sh_layer(id, sh)
{
	if ($(id))
	{
		var lay = $(id);

		// kirakas
		if (sh=='show')
		{
			// takaro
			COVER = new FullCover();
			COVER.show();
			//	rakattintasra beazrjuk
			$('Full_cover').addEvent('click', function()
			{
				sh_layer(id, 'hide');
			});

			// y pos: ablak tetejetol 10 pixel
			ypos = window.getScroll().y + 10;
			lay.setStyle('top', ypos);
			lay.setStyle('display','block');

		}

		if (sh=='hide')
		{
			lay.setStyle('display','none');
			//
			if ($chk(COVER))
				COVER.hide();
		}
	}
	return false;
}