function numbersAndDecimalOnly(evt)
{
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode == 46)
		return true;
	if (charCode > 31 && (charCode < 48 || charCode > 57))
		return false;
	return true;
}

function numbersOnly(evt)
{
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 48 || charCode > 57))
		return false;
	return true;
}

function alphaOnly(e)
{
	var k;
	document.all ? k = e.keyCode : k = e.which;
	return ((k > 64 && k < 91) || (k > 96 && k < 123) || k == 8);
}

function checkEmptyValue(fieldId, textId)
{
	if (isControlEmpty(fieldId))
	{
		document.getElementById(textId).style.display = "";
		return false;
	}
	else 
	{
		document.getElementById(textId).style.display = "none";
		return true;
	}
}

function checkEmptyValueNoStyle(fieldId)
{
	if (isControlEmpty(fieldId))
		return false;
	else 
		return true;
}

function isControlEmpty(checkControlId)
{
	var theControl;
	theControl = document.getElementById(checkControlId);
	return (theControl.value == '');
}

function focusInvalid(fieldId)
{
	document.getElementById(fieldId).focus();
}

function hideAll()
{
	hideLayer('rNav1');
	hideLayer('rNav2');
	hideLayer('rNav3');
	hideLayer('rNav4');
	hideLayer('rNav5');
}