function lib() {}
lib.prototype.init = function() {}

lib.prototype.attachEventListener = function (target, eventType, functionRef, capture) {
	if (typeof target.addEventListener != "undefined") {
		target.addEventListener(eventType, functionRef, capture);
	} else if (typeof target.attachEvent != "undefined") {
		target.attachEvent("on" + eventType, functionRef);
	} else {
		eventType = "on" + eventType;
		if (typeof target[eventType] == "function") {
			var oldListener = target[eventType];
			target[eventType] = function() {
				oldListener();
				return functionRef();
			}
		} else {
			target[eventType] = functionRef;
		}
	}
	return true;
}
lib.prototype.addLoadListener = function(fn) {
	if (typeof window.addEventListener != 'undefined') {
		window.addEventListener('load', fn, false);
	} else if (typeof document.addEventListener != 'undefined') {
		document.addEventListener('load', fn, false);
	} else if (typeof window.attachEvent != 'undefined') {
		window.attachEvent('onload', fn);
	} else {
		var oldfn = window.onload;
		if (typeof window.onload != 'function') {
			window.onload = fn;
		} else {
			window.onload = function() {
				oldfn();
				fn();
			};
		}
	}
}

lib.prototype.stopDefaultAction = function(event) {
	event.returnValue = false;
	if (typeof event.preventDefault != "undefined") {
		event.preventDefault();
	}
}

lib.prototype.addClass = function(target, className) {
	target.className += " " + className;
}

lib.prototype.removeClass = function(target, className) {
	target.className= target.className.replace(className, "");
}

var baseLib  = new lib();
baseLib.init();

function powercomGroup() {}
powercomGroup.prototype.init = function() {
	//preload the background images
	var imgs = ['bg_powercom_home','bg_novaris','bg_datacall','bg_powercom_consultants'];
	var obj = [];
	var i;
	for(i=0;i<imgs.length;i++) {
		obj[i] = new Image();
		obj[i].src = "/header-images/" + imgs[i] + ".jpg";
	}
}

powercomGroup.prototype.headerHandlers = function() {
	var icons = document.getElementById('header_panel_icons');
	if(icons) {
		//each icon container
		var icon = icons.getElementsByTagName('div');
		var i;
		for(i=0;i<icon.length;i++) {
			this.headerIconClick(icon[i]);
			this.headerIconOut(icon[i], icon[i].parentNode.parentNode.style.backgroundImage);
			this.headerIconOver(icon[i]);
		}
	}
}
powercomGroup.prototype.headerIconClick = function(icon) {
	baseLib.attachEventListener(icon, 'click',
		function() {
			location.href = icon.childNodes[0].getAttribute('href');
		}, false
	);
}
powercomGroup.prototype.headerIconOver = function(icon) {
	baseLib.attachEventListener(icon, 'mouseover',
		function() {
			baseLib.addClass(icon, "header_panel_icon_over");
			//show the correct background image
			var image = "url(/header-images/bg_" + icon.id + ".jpg)";
			icon.parentNode.parentNode.style.backgroundImage = image;
		}, false
	);
}
powercomGroup.prototype.headerIconOut = function(icon, original) {
	baseLib.attachEventListener(icon, 'mouseout',
		function() {
			baseLib.removeClass(icon, "header_panel_icon_over");
			//show the correct original background image
			icon.parentNode.parentNode.style.backgroundImage = original;
		}, false
	);
}

function Bootstrap() {
	pcg = new powercomGroup();
	pcg.init();
	pcg.headerHandlers();
}
baseLib.addLoadListener(Bootstrap);