function nav_hover(obj, x){
	$(obj).css('background-image', 'url(incl/img/nav_hover.png)');
	$(obj).css('background-position', '0px ' + x + 'px');
}

function nav_out(obj, active){
	if (active == 1){
		$(obj).css('background-image', 'url(incl/img/nav_aktiv.png)');	
	}else{
		$(obj).css('background-image', '');
	}
}

function head_hover(obj){
	$(obj).css('background-image', 'url(incl/img/head_hover.jpg)');
}

function head_out(obj, active){
	if (active == 1){
		$(obj).css('background-image', 'url(incl/img/head_aktiv.jpg)');	
	}else{
		$(obj).css('background-image', 'url(incl/img/head.jpg)');
	}
}