var waitSeconds = 5;
var prof_ctr = 1;
var fac_ctr = 1;

function fadeArea(area, ctr) {
  if(document.getElementById(area+"pic_"+twoDigit(ctr))) {
    var lastPic = false;
    if(!document.getElementById(area+"pic_"+twoDigit(ctr+1))) {
      lastPic = true;
    }
    if(lastPic) {
      for(i=1;i<ctr;i++) {
        Effect.Appear(area+"pic_"+twoDigit(i));
      }
      ctr = 1;
    } else {
      Effect.Fade(area+"pic_"+twoDigit(ctr));
      ctr ++;
    }
  }
  return ctr;
}

function fadeInterval() {
  if(document.getElementById("profpic_01")) {
    prof_ctr = fadeArea("prof", prof_ctr);
  }
  if(document.getElementById("facpic_01")) {
    fac_ctr = fadeArea("fac", fac_ctr);
  }
}

window.onload = function() {
  setInterval("fadeInterval()", (1000 * waitSeconds));
  if(typeof(afterLoad)=="function")
    afterLoad();
}

function twoDigit(num) {
  num = num+"";
  if(num.length=1)
    num="0"+num;
  return num;
}

function isValidEmail(email) {
  if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email))
    return true;
  else
    return false;
}