if (document.images){
	aboutnav1_on = new Image();
	aboutnav1_on.src = "images/about_nav1_on.gif";
	aboutnav1_off = new Image();
	aboutnav1_off.src = "images/about_nav1.gif";
	
	aboutnav2_on = new Image();
	aboutnav2_on.src = "images/about_nav2_on.gif";
	aboutnav2_off = new Image();
	aboutnav2_off.src = "images/about_nav2.gif";
	
	aboutnav3_on = new Image();
	aboutnav3_on.src = "images/about_nav3_on.gif";
	aboutnav3_off = new Image();
	aboutnav3_off.src = "images/about_nav3.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");
		}
	}
}