/* Ref: http://brainerror.net/scripts/javascript/blendtrans/ */

function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if (opacStart > opacEnd) {
		for (i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')", (timer * speed));
			timer++;
		}
	} 
	else if (opacStart < opacEnd) {
		for (i = opacStart; i <= opacEnd; i++) {
			setTimeout("changeOpac(" + i + ",'" + id + "')", (timer * speed));
			timer++;
		}
	}
} 

// Change the opacity for different browsers
function changeOpac(opacity, id) {
  var object = document.getElementById(id).style;
  object.opacity = (opacity / 100);
  object.MozOpacity = (opacity / 100);
  object.KhtmlOpacity = (opacity / 100);
  object.filter = "alpha(opacity=" + opacity + ")";
}

function fadeNext() {
	if (current == next) {
		next = (current + 1) % imgCount;
	}

  if (current >= 0) {
    opacity("bigImage"+current, 100, 0, 700);
  }
  if (next >= 0) {
    opacity("bigImage"+next, 0, 100, 700);
  }
	current = next;
  document.getElementById('bannerLink').href = bannerLinks[current];

  for (i = 0; i < imgCount; i++) {
    document.getElementById('bannerButton'+i).style['background'] = 'white';
  }
  document.getElementById('bannerButton'+current).style['background'] = '#a8013e';
  
  
	if (imgCount > 1) {
		mTimer = setTimeout("fadeNext()", delay);
	}
}