function checkForm()
{

  if (document.forms.form1.title.value == "")
  {
    alert ('Please enter your title.');
    document.forms.form1.title.focus();
    return false;
  }
  else if (document.forms.form1.name.value == "")
  {
    alert ('Please enter your name.');
    document.forms.form1.name.focus();
    return false;
  }
  if (document.forms.form1.address.value == "")
  {
    alert ('Please enter your address.');
    document.forms.form1.address.focus();
    return false;
  }
  else if (document.forms.form1.postcode.value == "")
  {
    alert ('Please enter your postcode.');
    document.forms.form1.postcode.focus();
    return false;
  }
  else if ((document.forms.form1.homePhone.value == "") && (document.forms.form1.mobilePhone.value == ""))
    //if there is no telephone number...
  {
    alert ('Please enter at least one contact telephone number.');
	document.forms.form1.homePhone.focus();
    return false;
  }
  else if ((document.forms.form1.homePhone.value != "") && (checkPhoneNumber(document.forms.form1.homePhone.value) == false))
  {
    alert ('Please enter your full home phone number, including dialling code.');
	document.forms.form1.homePhone.focus();
	return false;
  }
  else if ((document.forms.form1.mobilePhone.value != "") && (checkPhoneNumber(document.forms.form1.mobilePhone.value) == false))
  {
    alert ('Please enter your full mobile phone number.');
    document.forms.form1.mobilePhone.focus();
	return false;
  }
  else if (document.forms.form1.email.value == "")
  {
    alert ('Please enter your Email address.');
	document.forms.form1.email.focus();
    return false; 
  }
  else if (checkEmailAddress(document.forms.form1.email.value) == false)
  {
    alert ('Please enter a valid Email address.');
	document.forms.form1.email.focus();
    return false;
  }
  else if(document.forms.form1.currentJob.value == "")
  {
    alert ('Please enter your current job.');
	document.forms.form1.currentJob.focus();
	return false;
  }
  else if(document.forms.form1.currentPay.value == "")
  {
    alert ('Please enter your current pay.');
	document.forms.form1.currentPay.focus();
	return false;
  }
  else if(document.forms.form1.desiredJob.value == "")
  {
    alert ('Please enter your desired job.');
	document.forms.form1.desiredJob.focus();
	return false;
  }
  else if(document.forms.form1.desiredPay.value == "")
  {
    alert ('Please enter your desired pay.');
	document.forms.form1.desiredPay.focus();
	return false;
  }
  
    else if(document.forms.form1.cv.value == "")
  {
    alert ('Please attach your CV.');
	document.forms.form1.cv.focus();
	return false;
  }
  else
  {
	return true;  
  }
}

function checkEmailAddress(emailAddress)
{
  var allowed = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.@-_";
  var emailLength = emailAddress.length;
  var atSignPosition = 0;
  var finalDotPosition = 0;
  var numberOfDots = 0;
  var numberOfAtSigns = 0;

  if (emailLength < 5)
  {
    return false;
  }

  for (i = 0; i < emailLength ;i ++)
  {
    if (allowed.indexOf(emailAddress.charAt(i))<0)
    {
      return (false);
    }
    if ((emailAddress.charAt(i)) == "@")
    {
      numberOfAtSigns ++;
      atSignPosition = i;
    }
    else
    {
      if ((emailAddress.charAt(i)) == ".")
      {
        numberOfDots ++;
        finalDotPosition = i;
      }
    }
  }
  if (numberOfDots == 0)
  {
    return (false);
  }
  if (numberOfAtSigns != 1)
  {
    return (false);
  }
  if (atSignPosition > finalDotPosition)
  {
    return (false);
  }
  if (finalDotPosition == (emailLength-1))
  {
    return (false);
  }
  return (true);
}

function checkPhoneNumber(telephoneNumber)
{
  var telephoneNumberLength = telephoneNumber.length;
  if (telephoneNumberLength < 9)
  {
    return false;
  }
}