var waitSeconds = 5;

function start_slideshow() {
  var delay = waitSeconds * 1000;
  if(document.getElementById("banner_01")) {
    var start_frame = 1;
    var end_frame = 1;
    var all_frames_found = false;
    while(!all_frames_found) {
      if(document.getElementById("banner_"+twoDigit(end_frame))) {
        end_frame++;
      } else {
        all_frames_found = true;
        break;
      }
    }
    end_frame--;
    setTimeout(switch_slides(start_frame,start_frame,end_frame, delay), delay);
  }
}
                        
function switch_slides(frame, start_frame, end_frame, delay) {
  return (function() {
    setTimeout("Effect.Fade('banner_" + twoDigit(frame) + "');", 850);
    //Effect.Fade('banner_' + twoDigit(frame));
    if (frame == end_frame) { frame = start_frame; } else { frame = frame + 1; }
    Effect.Appear('banner_' + twoDigit(frame));
    //setTimeout("Effect.Appear('banner_" + twoDigit(frame) + "');", 850);
    setTimeout(switch_slides(frame, start_frame, end_frame, delay), delay + 850);
  })
}

window.onload = function() {
  start_slideshow();
}

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;
}