addLoadListener(init);

function init()
{
  document.forms["contactform"].onsubmit = validateFields;

  return true;
}

function validateFields()
{
  var name = document.forms["contactform"]["name"];
  var email = document.forms["contactform"]["email"];
  
  if (name.value == "")
  {
    var errorSpan = document.createElement("span");
    var errorMessage = document.createTextNode("Please enter your name");

    errorSpan.appendChild(errorMessage);
    errorSpan.className = "contacterrorMsg";

    var fieldLabel = name.previousSibling;

    while (fieldLabel.nodeName.toLowerCase() != "label")
    {
      fieldLabel = fieldLabel.previousSibling;
    }

    fieldLabel.appendChild(errorSpan);

    return false;
  }
  
  if (!/^[\w\.\-]+@([\w\-]+\.)+[a-zA-Z]+$/.test(email.value))
  {
    var errorSpan = document.createElement("span");
    var errorMessage = document.createTextNode("Please use a valid email address");

    errorSpan.appendChild(errorMessage);
    errorSpan.className = "contacterrorMsg";

    var fieldLabel = email.previousSibling;

    while (fieldLabel.nodeName.toLowerCase() != "label")
    {
      fieldLabel = fieldLabel.previousSibling;
    }

    fieldLabel.appendChild(errorSpan);

    return false;
  }
  
  
  
  
  
  
  
  
  
  return true;
}

function addLoadListener(fn)
{
  if (typeof window.addEventListener != 'undefined')
  {
    window.addEventListener('load', fn, false);
  }
  else if (typeof document.addEventListener != 'undefined')
  {
    document.addEventListener('load', fn, false);
  }
  else if (typeof window.attachEvent != 'undefined')
  {
    window.attachEvent('onload', fn);
  }
  else
  {
    var oldfn = window.onload;
    if (typeof window.onload != 'function')
    {
      window.onload = fn;
    }
    else
    {
      window.onload = function()
      {
        oldfn();
        fn();
      };
    }
  }
}