function validateCallBack(form){
	var messageA = "All fields are mandatory";
	var messageB = "Please write a valid email";
	var CanSubmit = true;
    CanSubmit = ForceEntry(form.fullName,messageA);
	if (CanSubmit && form.fullName.value == 'Fullname'){
		alert( messageA );
		form.fullName.focus();
		CanSubmit = false;
	}
	if (CanSubmit) CanSubmit = ForceEntry(form.telephone,messageA);;
	if (CanSubmit && form.telephone.value == 'Telephone'){
		alert( messageA );
		form.telephone.focus();
		CanSubmit = false;
	}
	if (CanSubmit) CanSubmit = ForceEntry(form.email,messageA);;	
	if (CanSubmit) CanSubmit = isEmail(form.email,messageB);;
	if (CanSubmit) CanSubmit = ForceEntry(form.question,messageA);;
	return CanSubmit;
}