if (document.images)
{
	//Top Menu Bar Graphics
	nav_home_over = new Image();
	nav_home_over.src = "images/nav_home_over.png";
	
	nav_home = new Image();
	nav_home.src = "images/nav_home.png";
	
	nav_web_over = new Image();
	nav_web_over.src = "images/nav_web_over.png";
	
	nav_web = new Image();
	nav_web.src = "images/nav_web.png";
	
	nav_video_over = new Image();
	nav_video_over.src = "images/nav_video_over.png";
	
	nav_video = new Image();
	nav_video.src = "images/nav_video.png";
	
	nav_design_over = new Image();
	nav_design_over.src = "images/nav_design_over.png";
	
	nav_design = new Image();
	nav_design.src = "images/nav_design.png";
	
	nav_contact_over = new Image();
	nav_contact_over.src = "images/nav_contact_over.png";
	
	nav_contact = new Image();
	nav_contact.src = "images/nav_contact.png";

}

function rollOn (imgName)
{
	if (document.images)
	{
		imgOn = eval (imgName + "_over.src");
		document[imgName].src = imgOn;
	}
}

function rollOff (imgName)
{
	if (document.images)
	{
		imgOff = eval (imgName + ".src");
		document[imgName].src = imgOff;
	}
}