function validate(){
	if (doValidate()){
		document.getElementById('form').submit();
	}
}

function doValidate(){

	if (document.getElementById('first_name').value==""){
		alert('Please enter your first name');
		document.getElementById('first_name').focus();
		return false;
	}
	if (document.getElementById('Surname').value==""){
		alert('Please Enter your last name');
		document.getElementById('Surname').focus();
		return false;
	}
if (document.getElementById('Organisation').value==""){
		alert('Please Enter your organisation');
		document.getElementById('Organisation').focus();
		return false;
	}
	if (!validateEmail(document.getElementById('email').value)){
		alert('Plese enter your email address in the correct format: youName@yourDomain.com');
		document.getElementById('email').focus();
		return false;
	} else {
		return true;
	}
}

function validateEmail(address) {
  if ((address == "")
    || (address.indexOf ('@') == -1)
    || (address.indexOf ('.') == -1))
      return false;
  return true;
}