function newImage(arg)
{
	if (document.images)
	{
		var rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
	else
	{
		return false;
	}
}

function SwitchImage(ImageID, NewImage)
{
	if(ImageID && NewImage)
	{
		document.getElementById(ImageID).src = NewImage;
		return true;
	}
	else
	{
		return false;
	}
}

function SwitchClass(DivID, NewClass)
{
	if(DivID && NewClass)
	{
		document.getElementById(DivID).className = NewClass;
		return true;
	}
	else
	{
		return false;
	}
}

var preloadFlag = false;
function preloadImages()
{
	if (document.images)
	{
		var LeftColumn_over = newImage("/images/Gateway/BackgroundLayer/LeftColumnBackgroundOver.jpg");
		var MiddleColumn_over = newImage("/images/Gateway/BackgroundLayer/MiddleColumnBackgroundOver.jpg");
		var RightColumn_over = newImage("/images/Gateway/BackgroundLayer/RightColumnBackgroundOver.jpg");
		var SchoolText_over = newImage("/images/Gateway/Buttons/SchoolText-over.jpg");
		var TravelText_over = newImage("/images/Gateway/Buttons/TravelText-over.jpg");
		var EcoText_over = newImage("/images/Gateway/Buttons/EcoText-over.jpg");
		preloadFlag = true;
	}
}