function preloader() 
{

     // counter
     var i = 0;

     // create object
     imageObj = new Image();

     // set image list
     images = new Array();
     images[0]="http://www.genesisca.org/img/nav_home_on.jpg";
     images[1]="http://www.genesisca.org/img/nav_about_on.jpg";
     images[2]="http://www.genesisca.org/img/nav_campaigns_on.jpg";
     images[3]="http://www.genesisca.org/img/nav_events_on.jpg";
     images[4]="http://www.genesisca.org/img/nav_action_on.jpg";
     images[5]="http://www.genesisca.org/img/nav_supporters_on.jpg";
     images[6]="http://www.genesisca.org/img/nav_contact_on.jpg";

     // start preloading
     for(i=0; i<=6; i++) 
     {imageObj.src=images[i];}
}