// Handle automatic rotation of image highlights.
function HighlightImage(){

    var NumberOfImages = document.getElementById("NumberOfImages").innerHTML;
    
    // take in the present selected image
    var selectedImage = document.getElementById("SelectedImage").innerHTML;
    var NextImage;
    
    if (selectedImage != NumberOfImages)
    {
        NextImage = selectedImage;
        NextImage = ++NextImage;
    }
    else
    {
        NextImage = 1;
    }
    
	SelectedImageObject = document.getElementById("img"+selectedImage);
	NextImageObject = document.getElementById("img"+NextImage);
	
	// fade out
    pWidgets(SelectedImageObject,20,100,6)

    // fade in the next image
    pWidgets(NextImageObject,100,100,10);
    
    // set my html take to have this present variable state
    document.getElementById("SelectedImage").innerHTML = NextImage;
    
    
	setTimeout("HighlightImage()",2400);

}



// Control the fade in and fade out of the images 
// Source website: www.pwidgets.com

pWidgetsFOID = new Object();
pWidgetsFTID = new Object();

function pWidgets(object, destOp, rate, delta){
if (!document.all)
return
    if (object != "[object]"){
        setTimeout("pWidgets("+object+","+destOp+","+rate+","+delta+")",0);
        return;
    }
        
    clearTimeout(pWidgetsFTID[object.sourceIndex]);
    
    diff = destOp-object.filters.alpha.opacity;
    direction = 1;
    if (object.filters.alpha.opacity > destOp){
        direction = -1;
    }
    delta=Math.min(direction*diff,delta);
    object.filters.alpha.opacity+=direction*delta;

    if (object.filters.alpha.opacity != destOp){
        pWidgetsFOID[object.sourceIndex]=object;
        pWidgetsFTID[object.sourceIndex]=setTimeout("pWidgets(pWidgetsFOID["+object.sourceIndex+"],"+destOp+","+rate+","+delta+")",rate);
    }
}