function fade_alpha(id,alpha)
{ 
var object = document.getElementById('menu_object_'+id).style;
object.opacity = alpha / 100;
object.MozOpacity = alpha / 100;
object.filter = "alpha(opacity="+alpha+")"; 
}

function pop_object(url,w,h)
{ 

    if (document.all)
        var xMax = screen.width, yMax = screen.height;
    else
        if (document.layers)
            var xMax = window.outerWidth, yMax = window.outerHeight;
        else
            var xMax = 640, yMax=480;

    var xOffset = (xMax - w)/2, yOffset = (yMax - h)/2;

thewindow = window.open(url,'popup','width='+w+',height='+h+',toolbars=no,scrollbars=no,copyhistory=yes,status=no,screenX='+xOffset+',screenY='+yOffset+',top='+yOffset+',left='+xOffset); 
}