var sPrevImg="";
preloadImages();

function swapImage(oThat, psImg)
{
	var oImg;
	
	sPrevImg = oThat.src;
	oThat.src = 'Images/Buttons/'+psImg+'.gif';
	
}

function restoreImage(oThat)
{
	oThat.src = sPrevImg;
}

function preloadImages()
{
	var newImg;
	var aImg = new Array('Home', 'Services', 'Floorplan', 'Location', 'Contact');
	
	if(document.images);
	{
		for (var i = 0; i < 5; i++)
			{
				newImg = new Image();
				newImg.src = 'Images/Buttons/'+aImg[i]+'-Off.gif';
				newImg = new Image();
				newImg.src = 'Images/Buttons/'+aImg[i]+'-Over.gif';
			}
	}
}