/* main registration form validation */
function validateReg(){
	if(document.forms.mainregistration.firstname.value == ""){
		alert("You need to fill in your First Name before you can register!");
	}
	else if(document.forms.mainregistration.surname.value == ""){
		alert("You need to fill in your Surname before you can register!");
	}
	else if(document.forms.mainregistration.emailaddress.value == ""){
		alert("You must enter a contact email address before you can continue!");
	}else{
		document.forms.mainregistration.submit();
	}
}

// Toggle visibility of an Id obj
function toggle( targetId ){
  if (document.getElementById){
  		target = document.getElementById( targetId );
			if(target != null){
				if (target.style.display == "none"){
					target.style.display = "";
				} else {
					target.style.display = "none";
				}
			}
  	}
}