function initializeIfame() 
 {
		document.getElementById("content_overlay_home").innerHTML = '<iframe src="iframe_google_home.php" width="680" marginwidth="0" height="380" marginheight="0" scrolling="auto" frameborder="0" ></iframe>';
	}
	
	function deinitializeIfame()
	{
		var divInOverlay = $("#content_overlay_home");
		if(divInOverlay.html() != null)
		{
			divInOverlay.html('');
		}
	}