// JavaScript Document
function gastebuch() {
	leftPosition = (screen.width) ? (screen.width-900)/2 : 0;
	topPosition = (screen.height) ? (screen.height-501)/2 : 0;
	var windowprops = 'width=900,height=501,top='+ topPosition +',left='+ leftPosition +',toolbar=no,locationbar=no,directories=no,statusbar=no,scrollbars=auto,menubar=no';
	popup = window.open("guestbook.html",'register',windowprops);
}

function dvd(){
	leftPosition = (screen.width) ? (screen.width-520)/2 : 0;
	topPosition = (screen.height) ? (screen.height-350)/2 : 0;
	var windowprops = 'width=520,height=350,top='+topPosition+',left='+leftPosition+',toolbar=no,location=no,directories=no,status=no,scrollbars=no,menubar=no';
	popup = window.open("dvd.html","dvd",windowprops);
}