function welcomePopup()
{
	if ($('welcome_popup').style.display == "none")
	{
		$('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";
		}
		$('left_regions').style.display = "none";
		$('welcome_popup').style.display = "block";
	}
	else
	{
		$('clearsite').style.display = "none";
		$('left_regions').style.display = "block";
		$('welcome_popup').style.display = "none";
		$('clearsite').style.width = "0px";
		$('clearsite').style.height = "0px";
	}
}