// MouseOn
                homeon = new Image(213, 65);
                homeon.src = "images/n_home_on.jpg";
                abouton = new Image(55, 65);
 				abouton.src = "images/n_about_on.jpg";
 				portfolioon = new Image(70, 65);
 				portfolioon.src = "images/n_portfolio_on.jpg";
 				exhibitionson = new Image(88, 65);
 				exhibitionson.src = "images/n_exhibitions_on.jpg";
 				contacton = new Image(68, 65);
				contacton.src = "images/n_contact_on.jpg";

				// MouseOff
				homeoff = new Image(213, 65);
				homeoff.src = "images/n_home.jpg";
				aboutoff = new Image(55, 65);
				aboutoff.src = "images/n_about.jpg";
				portfoliooff = new Image(70, 65);
				portfoliooff.src = "images/n_portfolio.jpg";
				exhibitionsoff = new Image(88, 65);
				exhibitionsoff.src = "images/n_exhibitions.jpg";
				contactoff = new Image(68, 65);
				contactoff.src = "images/n_contact.jpg";
				

				
				// image-swapping functions
function imgOn(imgName) {	
  if (document.getElementById) {
    document.getElementById(imgName).src = eval(imgName + "on.src");

  }
}

function imgOff(imgName) {
  if (document.getElementById) {
    document.getElementById(imgName).src = eval(imgName + "off.src");
  }
}
// swap images
function di(id,name)
{
  if (document.images)
    document.images[id].src=eval(name+".src");   
}