casestudy_on = new Image(); casestudy_on.src="img/shared/menu_buttons/casestudy_hl.gif"; 
casestudy_off = new Image(); casestudy_off.src="img/shared/menu_buttons/casestudy.gif";
 
about_on = new Image(); about_on.src="img/shared/menu_buttons/about_hl.gif"; 
about_off = new Image(); about_off.src="img/shared/menu_buttons/about.gif"; 

contact_on = new Image(); contact_on.src="img/shared/menu_buttons/contact_hl.gif"; 
contact_off = new Image(); contact_off.src="img/shared/menu_buttons/contact.gif";

business_on = new Image(); business_on.src="img/shared/menu_buttons/business_hl.gif"; 
business_off = new Image(); business_off.src="img/shared/menu_buttons/business.gif";


home_on = new Image(); home_on.src="img/shared/menu_buttons/home_hl.gif"; 
home_off = new Image(); home_off.src="img/shared/menu_buttons/home.gif";

shien_on = new Image(); shien_on.src= "img/shared/menu_buttons/shien_hl.gif"; 
shien_off = new Image(); shien_off.src="img/shared/menu_buttons/shien.gif";

soudan_on = new Image(); soudan_on.src="img/shared/menu_buttons/soudan_hl.gif"; 
soudan_off = new Image(); soudan_off.src="img/shared/menu_buttons/soudan.gif";