//preload global images that have an ON/OFF state. Images are found in the header, top nav and footer -->

	home_on = new Image();
	home_on.src = "http://www.chevron.com/common_graphics/nav_home_on.gif";
	home_off = new Image();
	home_off.src = "http://www.chevron.com/common_graphics/nav_home_off.gif";

	contact_us_on = new Image();
	contact_us_on.src = "http://www.chevron.com/common_graphics/nav_contact_on.gif";
	contact_us_off = new Image();
	contact_us_off.src = "http://www.chevron.com/common_graphics/nav_contact_off.gif";

	site_index_on = new Image();
	site_index_on.src = "http://www.chevron.com/common_graphics/nav_index_on.gif";
	site_index_off = new Image();
	site_index_off.src = "http://www.chevron.com/common_graphics/nav_index_off.gif";

	career_on = new Image(); 
    career_on.src = "http://www.chevron.com/common_graphics/nav_career_on.gif"; 
    career_off = new Image(); 
    career_off.src = "http://www.chevron.com/common_graphics/nav_career_off.gif";

	search_on = new Image();
	search_on.src = "http://www.chevron.com/common_graphics/nav_search_on.gif";
	search_off = new Image();
	search_off.src = "http://www.chevron.com/common_graphics/nav_search_off.gif";

	about_on = new Image();
	about_on.src = "http://www.chevron.com/common_graphics/nav_about_on.gif";
	about_off = new Image();
	about_off.src = "http://www.chevron.com/common_graphics/nav_about_off.gif";
	
	investors_on = new Image();
	investors_on.src = "http://www.chevron.com/common_graphics/nav_investors_on.gif";
	investors_off = new Image();
	investors_off.src = "http://www.chevron.com/common_graphics/nav_investors_off.gif";
	
	news_on = new Image();
	news_on.src = "http://www.chevron.com/common_graphics/nav_news_on.gif";
	news_off = new Image();
	news_off.src = "http://www.chevron.com/common_graphics/nav_news_off.gif";
	
	operations_on = new Image();
	operations_on.src = "http://www.chevron.com/common_graphics/nav_operations_on.gif";
	operations_off = new Image();
	operations_off.src = "http://www.chevron.com/common_graphics/nav_operations_off.gif";
	
	social_on = new Image();
	social_on.src = "http://www.chevron.com/common_graphics/nav_responsibility_on.gif";
	social_off = new Image();
	social_off.src = "http://www.chevron.com/common_graphics/nav_responsibility_off.gif";
	
	technology_on = new Image();
	technology_on.src = "http://www.chevron.com/common_graphics/nav_technology_on.gif";
	technology_off = new Image();
	technology_off.src = "http://www.chevron.com/common_graphics/nav_technology_off.gif";
	
	brands_on = new Image();
	brands_on.src = "http://www.chevron.com/common_graphics/nav_brands_on.gif";
	brands_off = new Image();
	brands_off.src = "http://www.chevron.com/common_graphics/nav_brands_off.gif";

//end pre-load of global navigation