if (document.images) {

 homeon = new Image();
 homeon.src = "/images/menu_home_on.gif";

 homeoff = new Image();
 homeoff.src = "/images/menu_home_off.gif";

 smr_storyon = new Image();
 smr_storyon.src = "/images/menu_smr_story_on.gif";

 smr_storyoff = new Image();
 smr_storyoff.src = "/images/menu_smr_story_off.gif";

 project_descriptionon = new Image();
 project_descriptionon.src = "/images/menu_project_description_on.gif";

 project_descriptionoff = new Image();
 project_descriptionoff.src = "/images/menu_project_description_off.gif";

 site_characteristicson = new Image();
 site_characteristicson.src = "/images/menu_site_characteristics_on.gif";

 site_characteristicsoff = new Image();
 site_characteristicsoff.src = "/images/menu_site_characteristics_off.gif";

 proposed_developmenton = new Image();
 proposed_developmenton.src = "/images/menu_proposed_development_on.gif";

 proposed_developmentoff = new Image();
 proposed_developmentoff.src = "/images/menu_proposed_development_off.gif";

 design_goalson = new Image();
 design_goalson.src = "/images/menu_design_goals_on.gif";

 design_goalsoff = new Image();
 design_goalsoff.src = "/images/menu_design_goals_off.gif";

 faqson = new Image();
 faqson.src = "/images/menu_faqs_on.gif";

 faqsoff = new Image();
 faqsoff.src = "/images/menu_faqs_off.gif";

 }