function launchZuma() 
		{
			zuma = window.open('zuma.aspx', 'zuma', 'status=no, toolbars=no, scrollbars=no, resizable=no, width=780, height=427');
			zuma.focus();
		}

		function show(destination)
		{
		    clear_destinations();
		    var elem = document.getElementById('div_mailing_thanks');
		    if(!elem) {
			    //var otherplace = "HongKong";
			    //if(destination == "HongKong") otherplace = "London";
			    //document.getElementById(otherplace).style.display = "none";
			    document.getElementById(destination).style.display = "block";
			}
		}
		
		function clear_destinations() {
			document.getElementById("Istanbul").style.display = "none";
			document.getElementById("Dubai").style.display = "none";
		}
		
		function show_form() {
		    div_join_mailing.style.display = "none";
		    div_mailing_form.style.display = "block";
		}
		
		function validate() {
		    var elem1 = document.getElementById('txt_firstname');
		    var elem2 = document.getElementById('txt_surname');
		    var elem3 = document.getElementById('txt_email');
		    var elem1div = document.getElementById('div_firstname_message');
		    var elem2div = document.getElementById('div_lastname_message');
		    var elem3div = document.getElementById('div_email_message');
		    set_invisible(elem1div);
		    set_invisible(elem2div);
		    set_invisible(elem3div);
		    
		    if(elem1.value=="") {
		        set_visible(elem1div);
		        elem1.focus()
                return false;
            }
		    if(elem2.value=="") {
		        set_visible(elem2div);
		        elem2.focus()
                return false;
            }
		    if(elem3.value=="") {
		        set_visible(elem3div);
		        elem3.focus()
                return false;
            }
		    return true;
		}
		
		function set_visible(obj) {
            obj.style.display = 'block';
            obj.style.visibility = 'visible';
		}
		
		function set_invisible(obj) {
            obj.style.display = 'none';
            obj.style.visibility = 'hidden';
		}