function validateCommentForm(commentform)
{

	if (!validFullName(commentform.author,"Name",true))
		return false;
	if (!validEmail(commentform.email,"E-mail",true))
		return false;
	if (!validComment(commentform.comment,"Comment"))
		return false;
	
	return true;
}

function validFullName(formField,fieldLabel)
{
	var result = true;
	
	if ((formField.value == "") || (formField.value.length <6 ))
	{
		alert('Please enter a value of 6 characters or more for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validEmail_Required(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter your correct e-mail address (i.e.) yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

function validEmail_Required(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validComment(formField,fieldLabel)
{
	var result = true;
	
	if ((formField.value == "") || (formField.value.length <5 ))
	{
		alert('Please enter a value of 5 characters or more for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}