// Form validation and submit
function validateSubsno(formName,fieldName,fieldSurname) {
	var subsnoVar = document.getElementById("mfm-subscription-number-input").value;
	var surname = document.getElementById('mfm-surname').value;
	// DSB-JG: Added second check to prevent web-service calls with non-numeric input
	if (subsnoVar == "" || isNaN(subsnoVar) == true) {
		document.getElementById("errorBox").innerHTML = "Please enter correct Subscription number.";
		document.getElementById("errorBox").style.display = "block";
		return false;
	} else if( surname == '' ) {
		document.getElementById('errorBox').innerHTML = "Please enter a Last name.";
		document.getElementById('errorBox').style.display = "block";
		return false;
	} else {
		document.getElementById("errorBox").innerHTML = "";
		document.getElementById("errorBox").style.display = "none";
		$('#'+fieldSurname).val(surname);
		$('#'+fieldName).val(subsnoVar);
		$('#'+formName).submit();
	}
}