function schema_popup() {
	if ($('schema_popup').style.display == "none")
	{
		$('title').style.display = "none";
		$('title_clear').style.height = "68px";
		$('clearsite').style.display = "block";
		$('clearsite').style.width = document.documentElement.scrollWidth + "px";
		if (document.documentElement.scrollHeight < document.documentElement.clientHeight)
		{
			$('clearsite').style.height = document.documentElement.clientHeight + "px";
		}
		else
		{
			$('clearsite').style.height = document.documentElement.scrollHeight + "px";
		}
		DOM.center($('schema_popup'), -175, -200);
		$('schema_popup').style.display = "block";
	}
	else
	{
		$('clearsite').style.display = "none";
		$('schema_popup').style.display = "none";
		$('title').style.display = "block";
		$('title_clear').style.height = "0px";
		$('clearsite').style.width = "0px";
		$('clearsite').style.height = "0px";
	}
}