function preloader() 
{

     // counter
     var i = 0;

     // create object
     imageObj = new Image();

     // set image list
     images = new Array();
     images[0] = "images/pulsanti/consegna.jpg"
     images[1] = "images/pulsanti/controllo.jpg"
     images[2] = "images/pulsanti/cornice.jpg"
     images[3] = "images/pulsanti/elaborazione.jpg"
     images[4] = "images/pulsanti/stampa.jpg"
     images[5] =  "copertine/digitale.jpg"
     images[6] = "copertine/morbida.jpg" 
     images[7] = "copertine/rigido.jpg"
     images[8] = "copertine/brossura.jpg"
     images[9] = "images/stepheader.jpg"
     

     // start preloading
     for(i=0; i<=9; i++) 
     {
          imageObj.src=images[i];
     }

}