function isArray(obj) {
   if (obj.constructor.toString().indexOf("Array") == -1)
      return false;
   else
      return true;
}

function toggleOpen(id){
	if(isArray(id)){
		for(i = 0; i < id.length; i++){
			toggleOpen(id[i]);
		}
	} else {	
		var showClass = "";
		var hideClass = "disappear";
		
		toggleElement = document.getElementById(id);
		
		if(toggleElement.className == showClass){
			toggleElement.className = hideClass;
		} else {
			toggleElement.className = showClass;
		}
	}
}

function checkEmailsMatch(inputOne, inputTwo, outputBox){
	var textOne = inputOne.value;
	var textTwo = inputTwo.value;
	var message = "";
	
	if(textOne != textTwo){
		message = "The E-mail addresses you have entered do not match.";
	}
	
	outputBox.innerHTML = message;
	
}