var i = 0;
var whatToDo;
var incrOrDecr;
var o = 11;
var a = 2;

function nopaciter (incrOrDecr) {
    if (navigator.appName == 'Microsoft Internet Explorer') {
        if (incrOrDecr == "increase") {
            document.getElementById('nb_banner' + i).style.display='block';
            if (o <= 96) {
                document.getElementById('nb_banner' + i).style.filter = "alpha(opacity=" + o + ")";
            } else {
                document.getElementById('nb_banner' + i).style.filter = "alpha(opacity=" + 100 + ")";
                setTimeout ("nanimate ('decrease')", 3000);
            }
            if (o <= 96) {
                o+=4;
                opacityIncreaseTimeout = setTimeout ("nopaciter('increase')", 70);
            }
        } else if (incrOrDecr == "decrease") {
            if (document.getElementById('nb_banner' + i) != null) {
                document.getElementById('nb_banner' + i).style.display='block';
                tisk = document.getElementById('nb_banner' + i).style.filter = "alpha(opacity=" + o + ")";
                if (o <= 98 && o > 10) {
                    o-=9;
                    opacityDecreaseTimeout = setTimeout ("nopaciter('decrease')", 70);
                } else {
                    document.getElementById('nb_banner' + i).style.filter = "alpha(opacity=" + 0 + ")";
                    document.getElementById('nb_banner' + i).style.display='none';
                    setTimeout ("nanimate ('increase')", 70);
                }
            }
        }
    }else {
        if (incrOrDecr == "increase") {
            if (o <= 96) {
                document.getElementById('nb_banner' + i).style.display='block';
                document.getElementById('nb_banner' + i).style.opacity="0." + o;
                
            } else {
                document.getElementById('nb_banner' + i).style.opacity="1";
                setTimeout ("nanimate ('decrease')", 3000);
            }
            if (o <= 96) {
                o+=4;
                opacityIncreaseTimeout = setTimeout ("nopaciter('increase')", 30);
            }
        } else if (incrOrDecr == "decrease") {
            if (document.getElementById('nb_banner' + i) != null) {
                document.getElementById('nb_banner' + i).style.display='block';
                document.getElementById('nb_banner' + i).style.opacity="0." + o;
                if (o <= 98 && o > 10) {
                    o-=9;
                    setTimeout ("nopaciter('decrease')", 70);
                } else {
                    document.getElementById('nb_banner' + i).style.opacity="0";
                    document.getElementById('nb_banner' + i).style.display='none';
                    setTimeout ("nanimate ('increase')", 70);
                }
            }
        }
    }
}

function nanimate (whatToDo) {

    if ( i <= a) {
    switch (whatToDo) {
        case 'increase':
          i+=1;
          o = 10;
          if (i>a) {
              i = 1;
              setTimeout ("nopaciter ('increase')", 50);
          }else {
          setTimeout ("nopaciter ('increase')", 50);
          }
        break;

        case 'decrease':
            o = 98;
           setTimeout ("nopaciter ('decrease')", 50);
        break;

        default:
            o = 98;
           setTimeout ("nopaciter ('decrease')", 50);
           i=1;
        break;
    }
}

 else {
    i = 0;
    whatToDo = "x";
    setTimeout ("nopaciter ('decrease')", 50);
}

}