function validate()
{
	errorPresent = false;
	errorMessage = "Sorry, your login cannot be validated.\r\nPlease check your IATA/CLIA number and try again.";
	iataNumber = document.login.iata.value
	iataLength = iataNumber.length;
	if(iataLength != 7 && iataLength != 8 && iataLength != 10)
	{
		alert(errorMessage);
		errorPresent = true;
	}
	else
	{
		if(!IsNumeric(iataNumber))
		{
			alert(errorMessage);
			errorPresent = true;
		}
	}
	if(!errorPresent)
	{
		window.location = "welcome.htm";
	}
	document.IDValid = false;
}