/*
Gradual-Highlight Image Script II- 
By J. Mark Birenbaum (birenbau@ugrad.cs.ualberta.ca)
Permission granted to Dynamicdrive.com to feature script in archive
For full source to script, visit http://dynamicdrive.com
*/
nereidFadeObjects = new Object();
nereidFadeTimers = new Object();
/* object - image to be faded (actual object, not name);
* destop - destination transparency level (ie 80, for mostly solid)
* rate  - time in milliseconds between trasparency changes (best under 100)
* delta  - amount of change each time (ie 5, for 5% change in transparency)
*/
function nereidFade(object, destOp, rate, delta)
{
    if (!document.all) return;

    if (object != "[object]")
    {  //do this so I can take a string too
        setTimeout("nereidFade("+object+","+destOp+","+rate+","+delta+")",0);
        return;
    }
        
    clearTimeout(nereidFadeTimers[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)
    {
        nereidFadeObjects[object.sourceIndex]=object;
	nereidFadeTimers[object.sourceIndex]=setTimeout("nereidFade(nereidFadeObjects["+object.sourceIndex+"],"+destOp+","+rate+","+delta+")",rate);
    }
}