if (document.images) {
	home_on = new Image();
	home_off = new Image();
	home_on.src = "/img/menu/home_on.gif";
	home_off.src = "/img/menu/home_off.gif";

	about_us_on = new Image();
	about_us_off = new Image();
	about_us_on.src = "/img/menu/about_us_on.gif";
	about_us_off.src = "/img/menu/about_us_off.gif";

	our_supply_on = new Image();
	our_supply_off = new Image();
	our_supply_on.src = "/img/menu/our_supply_on.gif";
	our_supply_off.src = "/img/menu/our_supply_off.gif";

	special_features_on = new Image();
	special_features_off = new Image();
	special_features_on.src = "/img/menu/special_features_on.gif";
	special_features_off.src = "/img/menu/special_features_off.gif";

	rfq_on = new Image();
	rfq_off = new Image();
	rfq_on.src = "/img/menu/rfq_on.gif";
	rfq_off.src = "/img/menu/rfq_off.gif";
   
  	component_on = new Image();
  	component_off = new Image();
  	component_on.src = "/img/menu/component_on.gif";
  	component_off.src = "/img/menu/component_off.gif";
  
  	aircraft_on = new Image();
  	aircraft_off = new Image();
  	aircraft_on.src = "/img/menu/aircraft_on.gif";
  	aircraft_off.src = "/img/menu/aircraft_off.gif";
  
 	logistics_on = new Image();
  	logistics_off = new Image();
  	logistics_on.src = "/img/menu/logistics_on.gif";
  	logistics_off.src = "/img/menu/logistics_off.gif";    
}

function imgOn(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + "_on.src");
  }
}

function imgOff(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + "_off.src");
  }
}