/* CONFIGURATION AREA */
/*
	browsers:
		IE - Microsoft Internet Explorer
		FF - FireFox
		Safari - Safari browser
		Opera - Opera browser
		all - includes IE, FF, Opera and Safari
		
	parentId:
		any existing Id attribute 
	tagName:
		any valid tag name
	tagPosition:
		all - all inner elements 
		children - first level children only
	className:
		any valid class name
*/

var browsers = 'all';
var config = {
	externals: new Array(
		{
			rel:'_blank'
		}
	),
	hovers: new Array(
		{
			parentId:'sidebar',
			tagName:'li',
			tagPosition:'all',
			className:'hover'
		}
	)
};

/* CODE AREA */

/* hovers */

var initHovers = function()
{
	for (var index in config.hovers){
		var conf = config.hovers[index];
		var topLevelElement = document.getElementById(conf.parentId);
		if (topLevelElement){
			var subElements = topLevelElement.getElementsByTagName(conf.tagName);
			for (var i = 0; i < subElements.length; i++){
				if (conf.tagPosition == 'all' || (conf.tagPosition == 'children' && subElements[i].parentNode.id == conf.parentId))
				{
					subElements[i].configIndex = index;
					subElements[i].onmouseover = function(){
						this.className += ' ' + config.hovers[this.configIndex].className;
					};
					subElements[i].onmouseout = function(){
						this.className = this.className.replace(config.hovers[this.configIndex].className,'');
					};
				}
			}
		}
	}
}

/* externals */

var initExternals = function()
{
	for (var index in config.externals){
		var conf = config.externals[index];
		var links = document.getElementsByTagName('a');
		if (links.length > 0){
			for (var i = 0; i < links.length; i++){
				if (links[i].rel == conf.rel)
				{
					links[i].target = '_blank';
				}
			}
		}
	}
}

/* common */

var currentState = {};

var opera = window.opera;
var safari = navigator.appVersion.indexOf("Safari") != -1;
var ie = document.all && !window.opera;
var ff = navigator.userAgent.indexOf("Firefox") != -1;

var addEvent = function(browsers,event,initMethod)
{
	if (opera && (browsers.match(/Opera/) || browsers.match(/all/))) {
		window.addEventListener(event, initMethod, false);
	} else if (safari && (browsers.match(/Safari/) || browsers.match(/all/))) {
		window.addEventListener(event, initMethod, false);
	} else if (ie && (browsers.match(/IE/) || browsers.match(/all/))) {
		window.attachEvent("on" + event, initMethod);
	} else if (ff && (browsers.match(/FF/) || browsers.match(/all/))) {
		window.addEventListener(event, initMethod, false);
	} else if (!ie && !ff && !safari && !opera) {
		if (window.addEventListener){
			window.addEventListener(event, initMethod, false);
		}
		else if (window.attachEvent){
			window.attachEvent("on" + event, initMethod);
		}
	} 
}

addEvent(browsers,'load',initHovers);
addEvent(browsers,'load',initExternals);