var blocked_i;

function menu_over(i){
	var div = document.getElementById('i' + i).getElementsByTagName('div');

	if(div[1].className == 'menu_item over'){
		blocked_i = i;
		return 0;
	}
	
	div[0].className = 'menu_item_left over';
	div[1].className = 'menu_item over';
	div[2].className = 'menu_item_right over';
}

function menu_out(i){
	if(blocked_i == i){return 0;}
	
	var div = document.getElementById('i' + i).getElementsByTagName('div');
	div[0].className = 'menu_item_left';
	div[1].className = 'menu_item';
	div[2].className = 'menu_item_right';
}