function $(id)
{
	return document.getElementById(id);
}

function addEvent(element, event, listener)
{
	if (event == 'load' && (navigator.userAgent.indexOf('Gecko/') != -1 ||
		typeof window.opera == 'object' && parseInt(window.opera.version()) > 8))
	{
		event = 'DOMContentLoaded';
	}

	if (typeof window.addEventListener != 'undefined')
	{
		element.addEventListener(event, listener, false);
	}
	else if (typeof window.attachEvent != 'undefined')
	{
		element.attachEvent('on' + event, listener);
	}
}