function validate_form_login()
{
	try
	{
		var typeID = document.getElementById("gebruikersnaam");
		if (typeID.value == "")
		{
			alert("Username cannot be empty.");
			typeID.focus();
			return false;
		}
		
		typeID = document.getElementById("wachtwoord");
		if (typeID.value == "")
		{
			alert("Password cannot be empty.");
			typeID.focus();
			return false;
		}
		
		return true;
		
	}
	catch(e)
	{
		alert("error " + e);
	}
}

function funcErrMessage(_param_)
{
	if (document.getElementById('idError'))
	{
		document.getElementById('idError').innerHTML = _param_;
	}

}