function changefade(img, imginc, bchangeinc)
{
    if (img == null)
        return;
            
    var inc = parseInt(imginc.title);
    var filter = img.style.filter;
    var opacity = img.style.opacity;
    
    if (filter != null)
    {
        // do the fade for IE
        var nFind1 = filter.indexOf("=");
        var nFind2 = filter.indexOf(")");
        if (nFind1!=-1 && nFind2!=-1)
        {
            var str = filter.substr(nFind1+1,nFind2-nFind1);
            var nFilter = parseInt(str);
            nFilter = nFilter + inc;
            if (inc > 0 && nFilter >= 70)
                inc = -inc;
            if (inc < 0 && nFilter == 0)
                inc = -inc;
            filter = "alpha(opacity="+nFilter+")";
            img.style.filter = filter;
        }
    }
    if (opacity != null)
    {
        // do the fade for mozilla
        var moz_opacity = img.style.opacity;
        moz_opacity = parseFloat(moz_opacity) + inc/100.0;
        if (inc > 0 && moz_opacity >= .70)
            inc = -inc;
        if (inc < 0 && moz_opacity == 0)
            inc = -inc
        img.style.opacity = ""+moz_opacity;
    }
    if (bchangeinc)
        imginc.title = inc;
        
}

function fadepictures(msectime)
{
    for (i=1;i<20;i++)
    {
        var sImg = "img" + i;
        var img = document.getElementById(sImg);  
        var sImgInc = "imgInc" + i;
        var imginc = document.getElementById(sImgInc);  
        if (imginc == null)
            break;
        changefade(img,imginc,true);
    }
    setTimeout("fadepictures("+msectime+")",msectime);
}