function imageReplace (whichpic) {
 if (document.getElementById) {
  document.getElementById('centreimage').src = whichpic.name;

  return false;
 } else {
  return true;
 }
}

function preloader() 

{


     // counter
     var i = 0;


     // create object
     imageObj = new Image();


     // set image list
     images = new Array();
     images[0]="images/b-home.jpg"
     images[1]="images/b-home-hover.jpg"
     images[2]="images/b-home-n.jpg"
     images[3]="images/b-radcam.jpg"
     images[4]="images/b-radcam-hover.jpg"
     images[5]="images/b-radcam-n.jpg"
     images[6]="images/b-animation.jpg"
     images[7]="images/b-animation-hover.jpg"
     images[8]="images/b-animation-n.jpg"
     images[9]="images/b-philately.jpg"
     images[10]="images/b-philately-hover.jpg"
     images[11]="images/b-philately-n.jpg"
     images[12]="images/b-other.jpg"
     images[13]="images/b-other-hover.jpg"
     images[14]="images/b-other-n.jpg"
     images[15]="images/b-contact.jpg"
     images[16]="images/b-contact-hover.jpg"
     images[17]="images/b-contact-n.jpg"


     // start preloading
     for(i=0; i<=17; i++) 
     {
          imageObj.src=images[i];
     }



}