var person1 = document.getElementById("person1");
var person2 = document.getElementById("person2");

person1.style.visibility = "hidden";
person2.style.visibility = "hidden";

function setPersonRow(event){

	var number = document.getElementById("numberofpersons");
	
	switch(number.value){
	
	case "0":	
				//alert(number.value);
	
				person1.style.visibility = "hidden";
				person2.style.visibility = "hidden";
				
				break;
	
	case "1":	
	
				//alert(number.value);
	
	
				person1.style.visibility = "visible";
				person2.style.visibility = "hidden";
				break;
				
	case "2":	
				//alert(number.value);

				person1.style.visibility = "visible";
				person2.style.visibility = "visible";
				break;
	}

}

function oeffnen(event){

//window.open("http://www.raumplanung.uni-dortmund.de/geo/typo3/fileadmin/invitation/invitationanswer.php");

var width_window = 600;
var height_window = 600;
var width_screen = (screen.width/2) - (width_window/2);
var height_screen = (screen.height/2) - (height_window/2);

var properties = "toolbar=no,location=no,directories=no,status=no,menubar=no, scrollbars=yes,resizable=yes,";
properties += "width=" + width_window +"," + "height=" + height_window + "," + "screenX=" + width_screen + "," + "screenY=" + height_screen;

window.open("fileadmin/invitation/invitationanswer.php","neu",properties);

//window.open("http://www.it-
//academy.cc","neu","toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes, 
//scrollbars=yes,resizable=yes,width=300,height=300");

}

function hotels_oeffnen(event){

//window.open("http://www.raumplanung.uni-dortmund.de/geo/typo3/fileadmin/invitation/invitationanswer.php");

var width_window = 600;
var height_window = 600;
var width_screen = (screen.width/2) - (width_window/2);
var height_screen = (screen.height/2) - (height_window/2);

var properties = "toolbar=no,location=no,directories=no,status=no,menubar=no, scrollbars=yes,resizable=yes,";
properties += "width=" + width_window +"," + "height=" + height_window + "," + "screenX=" + width_screen + "," + "screenY=" + height_screen;

window.open("http://germany.nethotels.com/info/Dortmund/events/spring/default_en.htm","neu",properties);

//window.open("http://www.it-
//academy.cc","neu","toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes, 
//scrollbars=yes,resizable=yes,width=300,height=300");

}

function oeffnen_rel_reg(event){

//window.open("http://www.raumplanung.uni-dortmund.de/geo/typo3/fileadmin/invitation/invitationanswer.php");

var width_window = 500;
var height_window = 500;
var width_screen = (screen.width/2) - (width_window/2);
var height_screen = (screen.height/2) - (height_window/2);

var properties = "toolbar=no,location=no,directories=no,status=no,menubar=no, scrollbars=yes,resizable=yes,";
properties += "width=" + width_window +"," + "height=" + height_window + "," + "screenX=" + width_screen + "," + "screenY=" + height_screen;

window.open("fileadmin/Registration/registration.php","neu",properties);

//window.open("http://www.it-
//academy.cc","neu","toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes, 
//scrollbars=yes,resizable=yes,width=300,height=300");



}