function citynav()
   {
   var w = document.cityselect.city.selectedIndex;
   var url_add = document.cityselect.city.options[w].value;
   window.location.href = url_add;
   }
   
function load() {
	var load = window.open('PDF/Executive summary.pdf','','scrollbars=yes,menubar=no,height=600,width=800,resizable=yes,toolbar=no,location=no,status=no');
} 
	function load2() {
	var load = window.open('PDF/Realistic vs Traditional maps.pdf','','scrollbars=yes,menubar=no,height=600,width=800,resizable=yes,toolbar=no,location=no,status=no');
}