function hover_1(element){
		element.className="navi_1_element_hover";
	}
	
	function unhover_1(element){
		element.className="navi_1_element";
	}
	
	function hover_2(element){
		element.className="navi_2_element_hover";
	}
	
	function unhover_2(element){
		element.className="navi_2_element";
	}