function validate_required(field,alerttxt)
{
	with (field)
	{
		if (value==null||value=="")
  	{
			alert(alerttxt);return false;
		}
		else 
		{
		return true;
		}
	}
}

function validate_form(thisform)
{
	with (thisform)
	{
		if (validate_required(name,"Name must be filled out!")==false)
  	{
			email.focus();
			return false;
		}
		if (validate_required(town,"Town must be filled out!")==false)
  	{
			email.focus();
			return false;
		}
		if (validate_required(email,"Email must be filled out!")==false)
  	{
			email.focus();
			return false;
		}
		if (validate_required(comments,"Comment must be filled out!")==false)
  	{
			email.focus();
			return false;
		}
	}
}