function hideId(id) {
//	document.getElementById(id).innerHTML = "";
	originalClass = document.getElementById(id).className;
	document.getElementById(id).className = originalClass + " hidden";
}

function shadeId(id) {
//	document.getElementById(id).innerHTML = "";
	originalClass = document.getElementById(id).className;
	document.getElementById(id).className = originalClass + " shade";
}

function disableInput(id) {
	var fieldName = document.getElementById(id).name;
	if (fieldName === "disabledAuthorNameField") {
		var randomnumber=Math.floor(Math.random()*100);
		var authName = "authorName" + randomnumber;
		document.getElementById(id).name = authName;
		document.getElementById(id).style.backgroundColor = "#fff";
	} else {
		document.getElementById(id).name = "disabledAuthorNameField";
		document.getElementById(id).style.backgroundColor = "#eee";
	}
}