jQuery.preloadImages = function()
{
  for(var i = 0; i<arguments.length; i++)
  {
    jQuery("<img>").attr("src", arguments[i]);
  }
};
$.preloadImages("images/navi_the_building_on.jpg", "images/navi_location_on.jpg","images/navi_availability_on.jpg","images/navi_ownership_on.jpg","images/navi_commissioning_on.jpg");
$.preloadImages("images/sub_navi_security_on.jpg", "images/sub_navi_amenities_on.jpg","images/sub_navi_sustainability_on.jpg","images/sub_navi_views_on.jpg");
$.preloadImages("images/sub_navi_access_on.jpg");
$.preloadImages("images/sub_navi_management_on.jpg");
$.preloadImages("images/sub_navi_schedule_on.jpg");
$(document).ready(function() {
	
	$('.navigation').hover(function() {
	$(this).attr("src",$(this).attr("src").replace("_off","_on"));
	}, function() {
	$(this).attr("src",$(this).attr("src").replace("_on","_off"));
	});
	/*
	$('#navi_building').hover(function() {
	$('#sub_navi_building').css("display","block");
	}, function() {
	$('#sub_navi_building').css("display","none");
	});
	$('#navi_location').hover(function() {
	$('#sub_navi_location').css("display","block");
	}, function() {
	$('#sub_navi_location').css("display","none");
	});
	$('#navi_availability').hover(function() {
	$('#sub_navi_availability').css("display","block");
	}, function() {
	$('#sub_navi_availability').css("display","none");
	});
	$('#navi_ownership').hover(function() {
	$('#sub_navi_ownership').css("display","block");
	}, function() {
	$('#sub_navi_ownership').css("display","none");
	});		
	*/
});