jQuery.preloadImages = function()
{
  for(var i = 0; i<arguments.length; i++)
  {
    jQuery("<img>").attr("src", arguments[i]);
  }
};
$.preloadImages("images/nav_discover_on.jpg", "images/nav_residential_on.jpg","images/nav_retail_on.jpg","images/nav_office_on.jpg","images/nav_westin_on.jpg","images/nav_contact_on.jpg");

$(document).ready(function() { 
$('#nav_discover').hover(function() {
	$(this).attr("src","images/nav_discover_on.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_on","_off"); }
	$('#active').attr("src",activeSrc);
		}, function() {
	$(this).attr("src","images/nav_discover_off.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_off","_on");}
	$('#active').attr("src",activeSrc);
});
$('#nav_residential').hover(function() {
	$(this).attr("src","images/nav_residential_on.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_on","_off"); }
	$('#active').attr("src",activeSrc);
		}, function() {
	$(this).attr("src","images/nav_residential_off.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_off","_on");}
	$('#active').attr("src",activeSrc);
});
$('#nav_retail').hover(function() {
	$(this).attr("src","images/nav_retail_on.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_on","_off"); }
	$('#active').attr("src",activeSrc);
		}, function() {
	$(this).attr("src","images/nav_retail_off.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_off","_on");}
	$('#active').attr("src",activeSrc);
});
$('#nav_office').hover(function() {
	$(this).attr("src","images/nav_office_on.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_on","_off"); }
	$('#active').attr("src",activeSrc);
		}, function() {
	$(this).attr("src","images/nav_office_off.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_off","_on");}
	$('#active').attr("src",activeSrc);
});
$('#nav_westin').hover(function() {
	$(this).attr("src","images/nav_westin_on.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_on","_off"); }
	$('#active').attr("src",activeSrc);
		}, function() {
	$(this).attr("src","images/nav_westin_off.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_off","_on");}
	$('#active').attr("src",activeSrc);
});
$('#nav_contact').hover(function() {
	$(this).attr("src","images/nav_contact_on.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_on","_off"); }
	$('#active').attr("src",activeSrc);
		}, function() {
	$(this).attr("src","images/nav_contact_off.jpg");
	activeSrc = $('#active').attr("src");
	if(activeSrc != null) {activeSrc = activeSrc.replace("_off","_on");}
	$('#active').attr("src",activeSrc);
});
});