function load_images() {
var image1 = new Image();
pic1on.src = 'images/gwsorange_64x36.gif';
pic1off.src = 'images/gwswhite_64x36.gif';
pic2on.src = 'images/rndservicesorange_111x36.gif';
pic2off.src = 'images/rndserviceswhite_111x36.gif';
pic3on.src = 'images/booksorange_61x36.gif';
pic3off.src = 'images/bookswhite_61x36.gif';
pic4on.src = 'images/musicorange_59x36.gif';
pic4off.src = 'images/musicwhite_59x36.gif';
pic5on.src = 'images/enquiriesorange_81x36.gif';
pic5off.src = 'images/enquirieswhite_81x36.gif';

} 

  if (document.images)
   {
     pic1on= new Image(64,36);
     pic1on.src="images/gwsorange_64x36.gif";
     
     pic1off= new Image(64,36);
     pic1off.src="images/gwswhite_64x36.gif";
     
     pic2on= new Image(111,36);
     pic2on.src="images/rndservicesorange_111x36.gif";
     
     pic2off= new Image(111,36);
     pic2off.src="images/rndserviceswhite_111x36.gif";
     
     pic3on= new Image(61,36);
     pic3on.src="images/booksorange_61x36.gif";
     
     pic3off= new Image(61,36);
     pic3off.src="images/bookswhite_61x36.gif";
     
     pic4on= new Image(59,36);
     pic4on.src="images/musicorange_59x36.gif";
     
	 pic4off= new Image(59,36);
     pic4off.src="images/musicwhite_59x36.gif"; 
     
     pic5on= new Image(81,36);
     pic5on.src="images/enquiriesorange_81x36.gif";
     
	 pic5off= new Image(81,36);
     pic5off.src="images/enquirieswhite_81x36.gif";  
 

     
   }

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

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