function przestaw( i )
     {
        var box1 = document.getElementById( "slide_box" );
        var box2 = document.getElementById( "slide_box2" );

        var bg1 = i;
        var bg2 = 0;
        if ( i<8 ) bg2 = i+1;
        else bg2 = 1;

        box1.style.backgroundImage= "url( klienci/0" + bg1 + ".jpg )";
        box2.style.backgroundImage= "url( klienci/0" + bg2 + ".jpg )";
        box1.style.opacity="1";
        box1.style.filter = "alpha(opacity=100)";

        box2.style.opacity="1";
        box2.style.filter = "alpha(opacity=100)";
     }

     function slide( przez, slide )
     {
        var slide_box = document.getElementById( "slide_box" );
        if ( przez > 0 )
        {
           slide_box.style.opacity = "0."+przez;
           slide_box.style.filter = "alpha(opacity="+przez+"0)";

           setTimeout( "slide( " + (przez-1) + ", " + slide + " )", 100 );
        }
        else
        {
           slide_box.style.opacity = "0";
           slide_box.style.filter = "alpha(opacity=0)";

           if ( slide < 8 )
           {
              setTimeout( "slide( 9, " + (slide+1) + " )", 3000 );
              setTimeout( "przestaw( "+(slide+1)+" )", 1 );
           }
           else
           {
              setTimeout( "slide( 9, 1 )", 3000 );
              setTimeout( "przestaw( 1 )", 1 );
           }
        }
     }