if (document.images) {
	nav1=new image();
	nav1.src="images/nav_03.gif";
	nav1b=new image();
	nav1b.src="images/nav_03b.gif";
	nav2=new image();
	nav2.src="images/nav_04.gif";
	nav2b=new image();
	nav2b.src="images/nav_04b.gif";
	nav3=new image();
	nav3.src="images/nav_05.gif";
	nav3b=new image();
	nav3b.src="images/nav_05b.gif";
	nav4=new image();
	nav4.src="images/nav_06.gif";
	nav4b=new image();
	nav4b.src="images/nav_06b.gif";
	nav5=new image();
	nav5.src="images/nav_09.gif";
	nav5b=new image();
	nav5b.src="images/nav_09b.gif";
	nav6=new image();
	nav6.src="images/nav_10.gif";
	nav6b=new image();
	nav6b.src="images/nav_10b.gif";
	nav7=new image();
	nav7.src="images/nav_07.gif";
	nav7b=new image();
	nav7b.src="images/nav_07b.gif";
	nav8=new image();
	nav8.src="images/nav_08.gif";
	nav8b=new image();
	nav8b.src="images/nav_08b.gif";
}


function imgRotate () {
var ranNum = Math.random()*12;
var picnum = Math.round(ranNum)+1;
imgElement=new Image();
imgElement=document.getElementById("header");
imgElement.src='images/header'+picnum+'.jpg';
}