/* Reference Article:

Dustin Diaz:

http://www.dustindiaz.com/top-ten-javascript/

*/



/* addEvent: simplified event attachment */

function addEvent( obj, type, fn ) {

	if (obj.addEventListener) {

		obj.addEventListener( type, fn, false );

		EventCache.add(obj, type, fn);

	}

	else if (obj.attachEvent) {

		obj["e"+type+fn] = fn;

		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }

		obj.attachEvent( "on"+type, obj[type+fn] );

		EventCache.add(obj, type, fn);

	}

	else {

		obj["on"+type] = obj["e"+type+fn];

	}

}



var EventCache = function(){

	var listEvents = [];

	return {

		listEvents : listEvents,

		add : function(node, sEventName, fHandler){

			listEvents.push(arguments);

		},

		flush : function(){

			var i, item;

			for(i = listEvents.length - 1; i >= 0; i = i - 1){

				item = listEvents[i];

				if(item[0].removeEventListener){

					item[0].removeEventListener(item[1], item[2], item[3]);

				};

				if(item[1].substring(0, 2) != "on"){

					item[1] = "on" + item[1];

				};

				if(item[0].detachEvent){

					item[0].detachEvent(item[1], item[2]);

				};

				item[0][item[1]] = null;

			};

		}

	};

}();

addEvent(window,'unload',EventCache.flush);



/* window 'load' attachment */

function addLoadEvent(func) {

	var oldonload = window.onload;

	if (typeof window.onload != 'function') {

		window.onload = func;

	}

	else {

		window.onload = function() {

			oldonload();

			func();

		}

	}

}



/* grab Elements from the DOM by className */

function getElementsByClass(searchClass,node,tag) {

	var classElements = new Array();

	if ( node == null )

		node = document;

	if ( tag == null )

		tag = '*';

	var els = node.getElementsByTagName(tag);

	var elsLen = els.length;

	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");

	for (i = 0, j = 0; i < elsLen; i++) {

		if ( pattern.test(els[i].className) ) {

			classElements[j] = els[i];

			j++;

		}

	}

	return classElements;

}



/* toggle an element's display */

function toggle(obj) {

	var el = document.getElementById(obj);

	if ( el.style.display != 'none' ) {

		el.style.display = 'none';

	}

	else {

		el.style.display = '';

	}

}



/* insert an element after a particular node */

function insertAfter(parent, node, referenceNode) {

	parent.insertBefore(node, referenceNode.nextSibling);

}



/* Array prototype, matches value in array: returns bool */

Array.prototype.inArray = function (value) {

	var i;

	for (i=0; i < this.length; i++) {

		if (this[i] === value) {

			return true;

		}

	}

	return false;

};



/* get, set, and delete cookies */

function getCookie( name ) {

	var start = document.cookie.indexOf( name + "=" );

	var len = start + name.length + 1;

	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {

		return null;

	}

	if ( start == -1 ) return null;

	var end = document.cookie.indexOf( ";", len );

	if ( end == -1 ) end = document.cookie.length;

	return unescape( document.cookie.substring( len, end ) );

}



function setCookie( name, value, expires, path, domain, secure ) {

	var today = new Date();

	today.setTime( today.getTime() );

	if ( expires ) {

		expires = expires * 1000 * 60 * 60 * 24;

	}

	var expires_date = new Date( today.getTime() + (expires) );

	document.cookie = name+"="+escape( value ) +

		( ( expires ) ? ";expires="+expires_date.toGMTString() : "" ) + //expires.toGMTString()

		( ( path ) ? ";path=" + path : "" ) +

		( ( domain ) ? ";domain=" + domain : "" ) +

		( ( secure ) ? ";secure" : "" );

}



function deleteCookie( name, path, domain ) {

	if ( getCookie( name ) ) document.cookie = name + "=" +

			( ( path ) ? ";path=" + path : "") +

			( ( domain ) ? ";domain=" + domain : "" ) +

			";expires=Thu, 01-Jan-1970 00:00:01 GMT";

}



/* quick getElement reference */

	function $() {

		var elements = new Array();

		for (var i = 0; i < arguments.length; i++) {

			var element = arguments[i];

			if (typeof element == 'string')

				element = document.getElementById(element);

			if (arguments.length == 1)

				return element;

			elements.push(element);

		}

		return elements;

	}