var getTo = 0;
var curHeight = 20;
var clHeight = 20;
var exHeight = 130;

function make_popup(){
  //var pop = document.createElement("div");
  //pop.id = "friendPop";
  var scrollY = document.documentElement.scrollTop || document.body.scrollTop || 0;
  document.getElementById("friendPop").style.top = ((window.innerHeight||document.body.offsetHeight) - curHeight + scrollY) + "px";
  scrollAdjust();
  //pop.style.height = curHeight + "px";
  //pop.innerHTML = "<a href='javascript:expander(\"friendPop\")'>Send this page to your friends!</a> \
  //<br>Enter your friends' email adresses, separated by spaces:<br><textarea id='emailbox'></textarea><br> \
  //Enter your name: <input type='text' id='myname'><br><button type='button' onclick='parseEmails();'>Send Emails</button>"
  //var expand = document.createElement("a");
  //expand.href="javascript:expander('friendPop')";
  //expand.appendChild(document.createTextNode("Send this page to your friends!"));
  //pop.appendChild(expand);
  //pop.appendChild(document.createElement("br"));
  //pop.appendChild(document.createTextNode("Enter your friends' email adresses, separated by spaces:"));
  //pop.appendChild(document.createElement("br"));
  //var box = document.createElement("textarea");
  //box.id = "emailbox";
  //pop.appendChild(box);
  //pop.appendChild(document.createElement("br"));
  //var box = document.createElement("input");
  //box.type="text";
  //box.id="myname";
  //pop.appendChild(document.createTextNode("Enter your name:"));
  //pop.appendChild(box);
  //pop.appendChild(document.createElement("br"));
  //var submit = document.createElement("button");
  //submit.type="button";
  //submit.onclick = function(){ parseEmails(); };
  //submit.appendChild(document.createTextNode("Send Emails"));
  //pop.appendChild(submit);
  //document.lastChild.appendChild(pop);
}

function expander(element){
  var pop = document.getElementById(element);
  if(pop){
    if(pop.className.indexOf("expanded")!=-1){
      pop.className = "";
      curHeight = clHeight;
      pop.style.height = curHeight + "px";
      pop.childNodes[0].childNodes[0].nodeValue = "Send this to your friends!";
      scrollAdjust();
    }
    else {
      pop.className = "expanded";
      curHeight = exHeight;
      pop.style.height = curHeight + "px";
      pop.childNodes[0].childNodes[0].nodeValue = "Close";
      scrollAdjust();
    }
  }
}

function scrollAdjust(){
  var pop = document.getElementById("friendPop");
  var scrollY = document.documentElement.scrollTop || document.body.scrollTop || window.scrollY ||  0;
  getTo = (window.innerHeight||document.body.offsetHeight) - curHeight + scrollY;
  window.setTimeout("scroller()", 10);
  //if(pop){ pop.style.top = window.innerHeight - curHeight + window.scrollY; }
}

function scroller(){
  var pop = document.getElementById("friendPop");
  ptop = parseInt(pop.style.top);
  if(Math.abs(ptop-getTo)>5){
    pop.style.top = (ptop + ((ptop - getTo)>0?-5:5)) + "px";
    window.setTimeout("scroller()", 10);
  }
  else{
    pop.style.top = ( getTo - 5 ) + "px";
  }
}

function parseEmails(){
  var emailbox = document.getElementById("emailbox").value;
  var myname = document.getElementById("myname").value;
  if(emailbox&&myname){
    var goodemails = "";
    var emails = emailbox.split(" ");
    for(var i=0;i<emails.length;i++){
      if(emails[i].match(/[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}/i)){
        goodemails += emails[i] + "|";
      }
    }
    if(goodemails){
      alert(goodemails.slice(0,goodemails.length-1));
      sendEmails(goodemails.slice(0,goodemails.length-1),myname);
    }
  }
}

function sendEmails(goodemails,myname) {
  http.open("GET", "ajaxHandler?myname="+escape(myname)+"&emails=" + escape(goodemails), true);
  http.onreadystatechange = function() { 
    if(http.readyState==4) {
      alert(http.responseText);
    }
  };
  http.send(null);
}

//window.onscroll = scrollAdjust;

function getHTTPObject() { var xmlhttp; /*@cc_on @if (@_jscript_version >= 5) try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch (E) { xmlhttp = false; } } @else xmlhttp = false; @end @*/ if (!xmlhttp && typeof XMLHttpRequest != 'undefined') { try { xmlhttp = new XMLHttpRequest(); } catch (e) { xmlhttp = false; } } return xmlhttp; }
var http = getHTTPObject(); // We create the HTTP Object

function checkRadios(){
  var a = $(".qwrapper");
  for(var i=0;i<a.length;i++){
    if($(a[i]).children(".choice:has(input[type=radio]:checked)").length<1){
      alert("You still need to answer question "+(i+1)+"!");
      return false;
    }
  }
  return true;
}