// ---------- Start E-mail a Page ---------- //
//document.onmousedown = hideEmailThis; //funny
function showEmailThis(){
  var email_pop = document.getElementById('email_pop');
  if ( email_pop ){
    email_pop.style.display = '';
  }
}
function hideEmailThis(){
  var email_pop = document.getElementById('email_pop');
  if ( email_pop ){
    email_pop.style.display = 'none';
  }
}
function checkEmailForm(email_form,base_url){
  var valid = true;

  var emailregex = /^[-_a-z0-9\.]+@[-_a-z0-9\.]+\.[-_a-z0-9]+$/;

  if ( email_form.your_first_name.value == '' ){
    valid = false;
    alert('Please enter your first name.');
    email_form.your_first_name.focus();
  }
  else if ( email_form.your_last_name.value == '' ){
    valid = false;
    alert('Please enter your last name.');
    email_form.your_last_name.focus();
  }
  else if ( !emailregex.test(email_form.your_email.value) ){
    valid = false;
    alert('Please enter a valid e-mail address.');
    email_form.your_email.focus();
  }
  else if ( email_form.their_first_name.value == '' ){
    valid = false;
    alert('Please enter the recipient\'s first name.');
    email_form.their_first_name.focus();
  }
  else if ( email_form.their_last_name.value == '' ){
    valid = false;
    alert('Please enter the recipient\'s last name.');
    email_form.their_last_name.focus();
  }
  else if ( !emailregex.test(email_form.their_email.value) ){
    valid = false;
    alert('Please enter a valid e-mail address.');
    email_form.their_email.focus();
  }

  if ( valid ){
    post_response_id = 'email_this_form';

    makePOSTRequest(email_form,base_url+'scripts/email/email_page.php');
  }

  return false;
}
// ---------- End E-mail a Page ---------- //

// ---------- Start Ballot Form Validation ---------- //
function validateBallotForm(form){
  var valid = false;

  if ( form.elements.Username.value != '' ){
    var selection = false;
    for ( x=0; x<form.elements.vote.length; x++ ){
      //alert(form.elements.vote[x].value);
      if ( form.elements.vote[x].checked == true ){
        selection = true;
      }
    }
    if ( selection )
      valid = true;
  }


  if ( !valid )
    alert ( 'Please enter your LinkShare Username and make a selection.' );
  return valid;
}
// ---------- End Ballot Form Validation ---------- //


// ---------- Start Navigation Drop Downs ---------- //
var DropDowns = Array;
function showDropDown(id){
  if ( id ){
    DropDowns[id] = 'open';
    document.getElementById(id).style.visibility = 'visible';
  }
}
function hideDropDown(id){
  if ( id && DropDowns[id] && DropDowns[id] == 'open' ){
    DropDowns[id] = 'closed';
    //setTimeout('document.getElementById(\''+id+'\').style.visibility = \'hidden\';',500);
    document.getElementById(id).style.visibility = 'hidden';
  }
}
function hideOpenDropDowns(){
  for ( x in DropDowns ){
    hideDropDown(x);
  }
}
// ---------- End Navigation Drop Downs ---------- //

// ---------- Start Homepage Logo Scrolling ---------- // 
function startLeftScroll(id){
  var box = document.getElementById(id);
  var box2 = document.createElement('div');
  box2.id = id+'_virtual';
  box2.innerHTML = box.innerHTML;
  box2.className = 'logo_box';
  box.parentNode.appendChild(box2);
  moveABit(id,0);
}
function moveABit(id,position){
    var keepscrolling = true;
    var box = document.getElementById(id);
    var other_box = document.getElementById(id+'_virtual');
    var width = box.offsetWidth;
    position = position - 1;
    box.style.left = position+'px';
    var other_position = position + width;
    other_box.style.left = other_position +'px';
     // if main box is completely hidden, move behind virtual
    var diff = (width) + position;
    if ( diff <= 1 ){
      position = 0;
    }
    if ( keepscrolling )
      setTimeout("moveABit('"+id+"','"+position+"');",100);
}
// ---------- End Homepage Logo Scrolling ---------- //


// ---------- Make POST Request ---------- //
var post_response_id;
function makePOSTRequest(obj,url){
  var poststr = "";
  var amp = '';
  var apoststr = '';
  for( var x=0;  x<obj.length;x++ ){
    try{
      if ( obj.elements[x].type && obj.elements[x].name ){
        apoststr = '';
        if(obj.elements[x].type == "text" || obj.elements[x].type == "textarea" || obj.elements[x].type == "hidden"){
          apoststr += amp+obj.elements[x].name+"="+encodeURIComponent(obj.elements[x].value);
        } else if (obj.elements[x].type == "checkbox") {
          apoststr += amp+obj.elements[x].name+"="+obj.elements[x].checked;
        } else if (obj.elements[x].type == "select" || obj.elements[x].type == "select-one") {
          apoststr += amp+obj.elements[x].name+"="+obj.elements[x].options[obj.elements[x].selectedIndex].value;
        }
        amp = '&';
        poststr += apoststr;
      }
    }catch(e){}
  }
  executePOSTRequest(url, poststr);
}

var http_request = false;
function executePOSTRequest(url, parameters) {
  http_request = false;
  if (window.XMLHttpRequest) { // Mozilla, Safari,...
    http_request = new XMLHttpRequest();
    if (http_request.overrideMimeType) {
       // set type accordingly to anticipated content type
       //http_request.overrideMimeType('text/xml');
      http_request.overrideMimeType('text/html');
    }
  } else if (window.ActiveXObject) { // IE
    try {
      http_request = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
      try {
        http_request = new ActiveXObject("Microsoft.XMLHTTP");
      } catch (e) {}
    }
  }
  if (!http_request) {
    alert('Cannot create XMLHTTP instance');
    return false;
  }

  http_request.onreadystatechange = alertContents;
  http_request.open('POST', url, true);
  http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  http_request.setRequestHeader("Content-length", parameters.length);
  http_request.setRequestHeader("Connection", "close");
  http_request.send(parameters);
  return true;
}

function alertContents() {
  if (http_request.readyState == 4) {
    if (http_request.status == 200) {
       //alert(http_request.responseText);
      result = http_request.responseText;
      if ( document.getElementById(post_response_id) ) {
        document.getElementById(post_response_id).innerHTML = result;
      }
    } else {
      //alert(http_request.status);
      //alert('There was a problem with the request.');
    }
  }
}