move_pointer.js

var __li_padding = 33;
var __pointer_half_width = 8;
function set_active_position(){
	set_position(calculate_position($('#block-menu-menu-ourwhiskytopmenu .content .menu li.active-trail')));
}
function set_position(distance){
	$('.menu_pointer_img').css('left',(distance+"px"));
}
function calculate_position(the_li){
	var the_li = $(the_li);
	var distance = 0;
	the_li.parent().children('li').each(function(i,li){
		if ( i < parseInt(the_li.attr('id'))) 
			distance += parseInt($(li).css('width').split('px')[0])+__li_padding;
	});
	distance += parseInt((parseInt(the_li.css('width').split('px')[0])+__li_padding)/2)-__pointer_half_width;
	return distance;
}
$(document).ready(function(){
	$('#block-menu-menu-ourwhiskytopmenu .content .menu li').each(function(i,li){
		li = $(li);
		li.attr('id',i);
		li.bind('mouseover', function(){
			set_position(calculate_position(this));
		});
		li.bind('mouseout', function(){
			set_active_position();
		});
	});
	set_active_position();
});