var imgSrc="images/nav/"
if(document.images){
	image1 = new Image();
	image1.src=imgSrc+"contact.gif";
	image2 = new Image();
	image2.src=imgSrc+"who.gif";
	image3 = new Image();
	image3.src=imgSrc+"what.gif";
	image4 = new Image();
	image4.src=imgSrc+"when.gif";
	image5 = new Image();
	image5.src=imgSrc+"why.gif";

	image1roll = new Image();
	image1roll.src=imgSrc+"contact-roll.gif";
	image2roll = new Image();
	image2roll.src=imgSrc+"who-roll.gif";
	image3roll = new Image();
	image3roll.src=imgSrc+"what-roll.gif";
	image4roll = new Image();
	image4roll.src=imgSrc+"when-roll.gif";
	image5roll = new Image();
	image5roll.src=imgSrc+"why-roll.gif";

	image1on = new Image();
	image1on.src=imgSrc+"contact-roll.gif";
	image2on = new Image();
	image2on.src=imgSrc+"who-on.gif";
	image3on = new Image();
	image3on.src=imgSrc+"what-on.gif";
	image4on = new Image();
	image4on.src=imgSrc+"when-on.gif";
	image5on = new Image();
	image5on.src=imgSrc+"why-on.gif";
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}