function gopage(zone, book, page) {
	var z = "home", b = "", p = "1";
	var numargs = arguments.length;
	switch( numargs ){
	case 3:
		p = page;
	case 2:
		b = book;
	case 1:
		z = zone;
	}
	top.document.location = "page.asp?z=" + z + "&b=" + b + "&p=" + p;
}

function openmenu( zone, book, page, menu, op ){
	document.location='page.asp?z=' + zone + '&b=' + book + '&m=' + menu + 
		'&o=' + op + "&p=" + page;
}

function openwindow( url, nom, w, h, fonctions ){
	var win;
	var W = Math.min( w, screen.availWidth );
	var H = Math.min( h, screen.availHeight );
	var X = ((screen.availWidth-W)/2);
	var Y= ((screen.availHeight-H)/2);
	win = window.open( url, nom, 'width=' + W + ',height=' + H + ',' + fonctions );
	win.moveTo(X,Y);
	win.focus();
}

function credits(){
	openwindow( "credits.asp", "credits", 360, 380, "scrollbars=yes,resizable=yes,status=yes" );
}
/*
function demo(){
	openwindow( "demo_popup.asp", "demo_popup", 500, 300, "scrollbars=yes,resizable=yes,status=yes" );
}
*/
function demo(){
	openwindow( "demo.asp", "demo", 800, 1000, "scrollbars=yes,resizable=yes,status=yes" );
}