function touristWindow () {
		theHeight = 640;
		theWidth = 860;
		window.open ('tourist.htm','touristWin',"left=" + ((screen.availWidth-theWidth)/2) + ",top=" + ((screen.availHeight-theHeight)/2) + ",height=" + theHeight + ",width=" + theWidth + ",scrollbars=yes,resizable=no,status=no,menubar=no,location=no");
		}
		
		
		function zone1Window () {
		theHeight = 640;
		theWidth = 860;
		window.open ('zone1.htm','touristWin',"left=" + ((screen.availWidth-theWidth)/2) + ",top=" + ((screen.availHeight-theHeight)/2) + ",height=" + theHeight + ",width=" + theWidth + ",scrollbars=yes,resizable=no,status=no,menubar=no,location=no");
		}
		
		
		
		function undergroundWindow () {
		theHeight = 600;
		theWidth = 600;
		window.open ('underground_all.htm','undergroundWin',"left=" + ((screen.availWidth-theWidth)/2) + ",top=" + ((screen.availHeight-theHeight)/2) + ",height=" + theHeight + ",width=" + theWidth + ",scrollbars=yes,resizable=no,status=no,menubar=no,location=no");
		}
		
        function bookWindow () {
		theHeight = 500;
		theWidth = 650;
		window.open ('https://dn-dog-secure.com/m-andm.co.uk/secure/book.asp','bookWin',"left=" + ((screen.availWidth-theWidth)/2) + ",top=" + ((screen.availHeight-theHeight)/2) + ",height=" + theHeight + ",width=" + theWidth + ",scrollbars=yes,resizable=yes,status=yes,menubar=yes,location=no");
		}