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

}

function map (category) {
   document.getElementById('mapover').className=category;
}
function mapnone (category) {
   document.getElementById('mapover').className="none";
}