function insert(text){
  document.addcomment.commenttext.value+=" "+ text;
  document.addcomment.commenttext.focus();
}
function readCookie() {
  var name = GetCookie('name');
  var email = GetCookie('email');
  var avatar = GetCookie('avatar');
  if (name != null) document.addcomment.name.value = name;
  if (email != null) document.addcomment.email.value = email;
  if (avatar != null) document.addcomment.avatar.value = avatar;
}
function SubmitComment() {
  var name = document.addcomment.name.value;
  var email = document.addcomment.email.value;
  var avatar = document.addcomment.avatar.value;
  var comment = document.addcomment.commenttext.value;
  if (document.addcomment.remember.checked) {
    var expiry = 365;
    var expdate = new Date();
    expdate.setTime(expdate.getTime() +  (24 * 60 * 60 * 1000 * expiry));
    SetCookie('name', name, expdate);
    SetCookie('email', email, expdate);
    SetCookie('avatar', avatar, expdate);
  }
  if (name.length > 19) {
    alert("You must use a name shorter than 20 characters");
    return false;
  }
  else if (email.length > 99) {
    alert("You must use an E-Mail shorter than 100 characters");
    return false;
  }
  else if (avatar.length > 254) {
    alert("You must use an avatar URL shorter than 255 characters");
    return false;
  }
  else if (comment.length > 2000) {
    alert("Your comment must be shorter than 2000 characters");
	return false;
  }
  else {
    return true;
  }
}
function SetCookie (name, value) {
  var argv = SetCookie.arguments;
  var argc = SetCookie.arguments.length;
  var expires = (argc > 2) ? argv[2] : null;
  var path = (argc > 3) ? argv[3] : null;
  var domain = (argc > 4) ? argv[4] : null;
  var secure = (argc > 5) ? argv[5] : false;
  document.cookie = name + "=" + escape (value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + ((path == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : "");
}
function GetCookie (name) {
  var arg = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen) {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg) return GetCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break;
  }
  return null;
}
function GetCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1) endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}
function forget() {
  var expDate = new Date();
  SetCookie('name', '', expDate);
  SetCookie('email', '', expDate);
  SetCookie('avatar', '', expDate);
  document.addcomment.name.value = '';
  document.addcomment.email.value = '';
  document.addcomment.avatar.value = '';
  alert("Cookies cleared");
}