/* bio view/close */

function displayBio(bio){
	 document.getElementById(bio).style.display = 'block';
	 document.getElementById(bio).style.paddingTop = '1em';
	 document.getElementById(bio).style.paddingBottom = '1em';	 
}

function clearBio(bio){
	 document.getElementById(bio).style.display = 'none';
}





/* adapted from http://www.clagnut.com/sandbox/imagefades/ */

var imageNo = 0;
var maxImages = 7;
function startFade() {
imageNo++;
if (imageNo <= maxImages){		
  imageId = 'banner' + imageNo;
  image = document.getElementById(imageId);
  setOpacity(image, 0);
  image.style.visibility = 'visible';
  fadeIn(imageId,0);
 } else {
 // if we're at the last image, hide the others and fade out
   for (var i=1; i < maxImages; i++){
	  imageId = 'banner' + i;
    image = document.getElementById(imageId);
		setOpacity(image, 0);
    // image.style.visibility = 'hidden';
	 }
	imageNo--;
	imageId = 'banner' + imageNo;
  image = document.getElementById(imageId);
	setOpacity(image, 100);
  fadeOut(imageId,100);
	imageNo = 0; 
 }
}


function setOpacity(obj, opacity) {
  opacity = (opacity == 100)?99.999:opacity;
  obj.style.filter = "alpha(opacity:"+opacity+")";
  obj.style.KHTMLOpacity = opacity/100;
  obj.style.MozOpacity = opacity/100;
  obj.style.opacity = opacity/100;
}

function fadeIn(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity <= 100) {
      setOpacity(obj, opacity);
      opacity += 10;
      window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);
    }
  }
}

function fadeOut(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity >= 0) {
      setOpacity(obj, opacity);
      opacity -= 10;
      window.setTimeout("fadeOut('"+objId+"',"+opacity+")", 100);
    }
  }
}

window.onload = setInterval("startFade()", 5500);