function changeMenuBackground(id, tryb){
	switch(tryb){
		case 'On':
			var menuToChange = document.getElementById(id);
			if(id == 'menu0'){
				menuToChange.style.background = 'url(templates/domfinansowy/images/menu_first_on.gif) no-repeat';
			} else {
				menuToChange.style.background = 'url(templates/domfinansowy/images/menu_on.gif) no-repeat';
			}
		break;
		case 'Off':
			var menuToChange = document.getElementById(id);
			if(id == 'menu0'){
				menuToChange.style.background = 'url(templates/domfinansowy/images/menu_first_off.gif) no-repeat';
			} else {
				menuToChange.style.background = 'url(templates/domfinansowy/images/menu_off.gif) no-repeat';
			}
		break;
	}
}

function changeMainBackground(){
	var MainBackground = document.getElementById('main');
	var images = new Array('background_1.png', 'background_2.png', 'background_3.png', 'background_4.png', 'background_5.png');
	var its = new Array('0', '1', '2', '3', '4');
	its = its.sort(randOrd);
	MainBackground.style.background = 'url(images/backgrounds/'+images[its[1]]+') no-repeat bottom right';
}

function randOrd(){
	return (Math.round(Math.random())-0.5);
}