function spawn( which ) {
	var height = 425;
	var width = 400;
	var where = 'tours/' + which;
	if( window.screen ) {
		spawnWindow = window.open( where, "spawn", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=no,resizable=0,copyhistory=0,width=" + width + " ,height=" + height + " ,top=" + ( (screen.availHeight / 2) -  (height / 2) ) + ",left=" + ( (screen.availWidth / 2) - (width / 2) ) );
		} else {                        
		spawnWindow = window.open( where, "spawn", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=no,resizable=0,copyhistory=0,width=" + width + " ,height=" + height);
	}
	if( window.focus ) {
		while( !spawnWindow.focus ) {}
		spawnWindow.focus();
	}
}