function preloader() 

{
     // counter
     var i = 0;

     // create object
     imageObj = new Image();

     // set image list
     images = new Array();
     images[0]="../images/nav/nav_find.gif"
     images[1]="../images/nav/nav_find_on.gif"
     images[2]="../images/nav/nav_clubs.gif"
     images[3]="../images/nav/nav_clubs_on.gif"
     images[4]="../images/nav/nav_contests.gif"
     images[5]="../images/nav/nav_contests_on.gif"
     images[6]="../images/nav/nav_newsletter.gif"
     images[7]="../images/nav/nav_newsletter_on.gif"
     images[8]="../images/nav/nav_mb.gif"
     images[9]="../images/nav/nav_mb_on.gif"
     images[10]="../images/nav/nav_booksellers.gif"
     images[11]="../images/nav/nav_booksellers_on.gif"
     images[12]="../images/nav/nav_authors.gif"
     images[13]="../images/nav/nav_authors_on.gif"
     images[14]="../images/nav/nav_write.gif"
     images[15]="../images/nav/nav_write_on.gif"

     // start preloading
     for(i=0; i<=15; i++) 
     {
          imageObj.src=images[i];
     }

}