function Preload() { 	var args = simplePreload.arguments;	document.imageArray = new Array(args.length);	for(var i=0; i<args.length; i++) {		document.imageArray[i] = new Image;		document.imageArray[i].src = args[i];	}   }

function display (category) {   
	var whichcategory = document.getElementById(category);
	if (whichcategory.className=="show") {
		whichcategory.className="hide";
	} else {
		whichcategory.className="show";
	}
}