/**\
 ||
 ||  fade(eid): http://www.switchonthecode.com/tutorials/javascript-tutorial-simple-fade-animation
 ||               downloaded from here, fades stuff
\**/
var TimeToFade = 1000.0;

function fade(eid)
{
  var element = document.getElementById(eid);
  if(element == null)
    return;
   
  if(element.FadeState == null)
  {
    if(element.style.opacity == null 
        || element.style.opacity == '' 
        || element.style.opacity == '1')
    {
      element.FadeState = 2;
    }
    else
    {
      element.FadeState = -2;
    }
  }
    
  if(element.FadeState == 1 || element.FadeState == -1)
  {
    element.FadeState = element.FadeState == 1 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade - element.FadeTimeLeft;
  }
  else
  {
    element.FadeState = element.FadeState == 2 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade;
    setTimeout("animateFade(" + new Date().getTime() + ",'" + eid + "')", 33);
  }  
  return;
}

/**\
 ||
 ||  animateFade(lastTick, eid): http://www.switchonthecode.com/tutorials/javascript-tutorial-simple-fade-animation
 ||               				 downloaded from here, fades stuff
\**/

function animateFade(lastTick, eid)
{  
  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;
  
  var element = document.getElementById(eid);
 
  if(element.FadeTimeLeft <= elapsedTicks)
  {
    element.style.opacity = element.FadeState == 1 ? '1' : '0';
    element.style.filter = 'alpha(opacity = ' 
        + (element.FadeState == 1 ? '100' : '0') + ')';
    element.FadeState = element.FadeState == 1 ? 2 : -2;
    return;
  }
 
  element.FadeTimeLeft -= elapsedTicks;
  var newOpVal = element.FadeTimeLeft/TimeToFade;
  if(element.FadeState == 1)
    newOpVal = 1 - newOpVal;

  element.style.opacity = newOpVal;
  element.style.filter = 'alpha(opacity = ' + (newOpVal*100) + ')';
  
  setTimeout("animateFade(" + curTick + ",'" + eid + "')", 33);
}

/**\
 ||
 ||  slideshow(): fades pics from the homeimgs folder from one to the next
 ||               				
\**/

function slideshow()
{ 
	var imgarray = imagearray();
	var image = new Array();
	j = 0;
	for (i = 0; i < imgarray.length; i++) {
		if (!imgarray[j]) {
			j = 0;
		}
		image[i] = "/content/homepagepics/" + imgarray[j];
		j++;
	}
	cycle = 10000;
//	alert(j);
	for (i = 1; i <= (2*j); i++) {
		delay = cycle * .5 * i;
		offset = 0;
		setTimeout("fade('homeimgtop');",(delay*1 + offset*1));
	}
	for (i = 0; i < j; i++) {
		delay = cycle * i;
		offset = 0;
       	setTimeout("swaptop(" + i + ");",(delay*1 + offset*1)); 
	}
	for (i = 0; i < j; i++) {
		delay = cycle * i;
		offset = cycle * .5;	
	   	setTimeout("swapbum(" + i + ");",(delay*1 + offset*1)); 
	}
/**/
	// start over :-)
    setTimeout("slideshow();",(cycle * imgarray.length));
}

/**\
 ||
 ||  swaptop(index): switches the top picture
 ||               				
\**/
function swaptop(index)
{
var imgarraypre = imagearray();
var image = new Array();
for (i = 0; i < imgarraypre.length; i++) {
	image[i] = "/content/homepagepics/" + imgarraypre[i];
}
	parent.document.getElementById('homeimgtop').src = image[index];
} 
/**\
 ||
 ||  swapbum(index): switches the bottom picture
 ||               				
\**/

function swapbum(index)
{
var imgarraypre = imagearray();
var image = new Array();
for (i = 0; i < imgarraypre.length; i++) {
	image[i] = "/content/homepagepics/" + imgarraypre[i];
}
	parent.document.getElementById('homeimgbum').src = image[index];
} 

/**\
 ||
 ||  swapimagearraybum(): generates a list of file names from the /content/homepagepics/ folders. only jpegs are included.
 ||               				
\**/

function imagearray()
{
 var phpfile = "/content/homepagepics/imagelist.php"
 var imagelist = ajaxFunction(phpfile);
 var imagepre = imagelist.split(',');
 var imagepst = new Array();
 var j = 0;
 for (i = 0; i < imagepre.length; i++) {
	if (imagepre[i] != "") {
 		imagepst[j] = imagepre[i];
 		j++
	}
 }
 return imagepst;
}