var preloadDone = false;
function swap(imgNam,imgSrc) {
	document.images[imgNam].src = imgSrc;
	doPreload();
}
function doPreload() {
	if (preloadDone == false) {
		var images = new Array('/news/magazine/images/wrapper/bullet_globalnav_o.gif','/news/magazine/images/wrapper/bullet_nav_o.gif','/news/magazine/images/wrapper/nav_features_o.gif','/news/magazine/images/wrapper/nav_red_o.gif','/news/magazine/images/wrapper/nav_farm_o.gif','/news/magazine/images/wrapper/nav_farmnews_o.gif','/news/magazine/images/wrapper/nav_farmsports_o.gif','/news/magazine/images/wrapper/nav_dept_o.gif','/news/magazine/images/wrapper/nav_classnotes_o.gif','/news/magazine/images/wrapper/nav_show_o.gif','/news/magazine/images/wrapper/nav_columns_o.gif','/news/magazine/images/wrapper/nav_pc_o.gif','/news/magazine/images/wrapper/nav_classifieds_o.gif','/news/magazine/images/wrapper/nav_contact_o.gif','/news/magazine/images/wrapper/nav_donate_o.gif','/news/magazine/images/wrapper/nav_back_o.gif');
		preloadImages(images);
	}
}	
function preloadImages(images_array) 
{
	for(loop = 0; loop < images_array.length; loop++)
		{
			var an_image = new Image();
			an_image.src = images_array[loop];
		}
	preloadDone = true;
}