function isBlank(e)
{
	if (e.value == null || e.value == "") return true;

	for (var i=0; i < e.value.length; i++)
	{
		var c = e.value.charAt(i);
		if ((c != ' ') && (c != '\n') && (c != '\t')) return false;
	}

	return false;
}

function onSubmit()
{
	var form = document.helpForm;
	if (isBlank(form.msisdn.value) || !isNumeric(form.msisdn.value))
	{
		alert("Please enter a valid mobile number" + form.msisdn.value);
		return false;
	}
return true;
}