var patient_count;
var patient_interval;
var old_patient = 0;
var current_patient=0;
var home_interval;
var ishover = false;
var tab=1;
var video = '<embed style="width:400px; height:326px;" id="VideoPlayback" type="application/x-shockwave-flash" src="http://video.google.com/googleplayer.swf?docId=1914420305015014079&hl=en" flashvars=""> </embed>';
$(document).ready(function(){
  patient_count = $("#AllPatients > div.scroll").size();
  $("#AllPatients > div.scroll:eq("+current_patient+")").css('top','5px');
  patient_interval = setInterval(patient_rotate,10000);
  
  $("#HomeNav a").hover(
    function(){
      tab = $("#HomeNav a").index(this) + 1;
      home_rotate();
      ishover = true;},
    function(){
      ishover = false;
  });
  
  home_interval = setInterval(home_rotate,8000);
  

});
function home_rotate() {
    if(ishover){return;}
    if(tab==2){
      $("#HomeNav").removeClass("learn pat").addClass("about");
      tab++;
      return;
      }
    else if(tab==3){
      $("#HomeNav").removeClass("about learn").addClass("pat");
      tab=1;
      return;
      }
    else if(tab==1){
      $("#HomeNav").removeClass("pat about").addClass("learn");
      tab++;
      return;
      }
  
}

function patient_rotate() {
  current_patient = (old_patient + 1) % patient_count; //remainder will always equal old_patient until it reaches patient_count - at which point it becomes zero. clock arithmetic
  $("#AllPatients > div.scroll:eq(" + old_patient + ")").animate({top: -405},"slow", function() {
    $(this).css('top','410px');
    });
  $("#AllPatients > div.scroll:eq(" + current_patient + ")").show().animate({top: 5},"slow");  
  old_patient = current_patient;
}