function valCallMeBack(){
	var isValid = true;
	var message = '';
	var name = document.getElementById('cmb-name').value;
	var email = document.getElementById('cmb-email').value;
	var telephone = document.getElementById('cmb-telephone').value;
	var errBlock = document.getElementById('cmb-Errs'); 
	if(name.length==0){
		isValid = false;
		message += "<p>Please enter your name</p>"; 
	}
	if(telephone.length==0){
		isValid = false;
		message += "<p>Please enter your phone number</p>"; 
	}
	if(email.length != 0){
		if(!checkEmail(email)){
			isValid = false;
			message += '<p>Please enter a valid email address</p>';
		}
	}else{
		isValid = false;
		message += '<p>Please enter your email address</p>';
	}
	if(isValid==false){
		errBlock.innerHTML = message;
	} 
	return isValid;
}
function checkEmail(email) {
	var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	return filter.test(email);
}