Understanding the language with objects and prototype

gistfile1.js

function DebugConsole() {
	var consoleElem = document.createElement('div');
	
	consoleElem.id = "debug";
	document.body.appendChild(consoleElem);

	this.shaded = false;
}

DebugConsole.prototype.displayMsg = function(msg) {
	var msgElement = document.createElement('div');
	
	msgElement.appendChild(document.createTextNode(msg));
	msgElement.className = 'text-log';

	var consoleElement = document.getElementById('debug');
	
	consoleElement.appendChild(msgElement);

	this.shaded = !this.shaded;
}