function checkRegisterForm(){

	var name = document.getElementById("name").value;
	var email = document.getElementById("email").value;
	var num_attend = document.getElementById("num_attend").value;
	var form = document.getElementById("register_form");
	var error = "";
	
	if (name.length == 0){
		error += "- Your name appears to be missing, please provide your name.\r\n";
	} 
	if (email.length == 0){
		error += "- Your email appears to be missing, please provide your email.\r\n";
	}
	if (num_attend.length == 0){
		error += "- The number attending appears to be missing, please provide this number.\r\n";
	}
	
	var atLeastOneChecked = false;
	for (var i = 0; i<=form.elements.length - 1; i++){
		var this_element = form.elements[i];
		if (this_element.name.indexOf("register_id[]") >= 0){
			if (this_element.checked){
				atLeastOneChecked = true;
			}
		}
	}
	if (!atLeastOneChecked){
		error += "- At least one event is not checked. Please select at least one event by checking its checkbox.\r\n"
	}

	if (error.length > 0){
		alert(error);
		return false;
	} else {
		return true;
	}

}