/* 
* Cross-browser event handling, by Scott Andrew
*/
function addEvent(element, eventType, lamdaFunction, useCapture) {
	if (element.addEventListener) {
		element.addEventListener(eventType, lamdaFunction, useCapture);
		return true;
	} else if (element.attachEvent) {
		var r = element.attachEvent('on' + eventType, lamdaFunction);
		return r;
	} else {
		return false;
	}
}

/* 
* Kills an event's propagation and default action
*/
function knackerEvent(eventObject) {
	if (eventObject && eventObject.stopPropagation) {
		eventObject.stopPropagation();
	}
	if (window.event && window.event.cancelBubble) {
		window.event.cancelBubble = true;
	}

	if (eventObject && eventObject.preventDefault) {
		eventObject.preventDefault();
	}
	if (window.event) {
		window.event.returnValue = false;
	}
}

/* 
* Safari doesn't support canceling events in the standard way, so we must
* hard-code a return of false for it to work.
*/
function cancelEventSafari() {
	return false;
}

/* 
* Cross-browser style extraction, from the JavaScript & DHTML Cookbook
* <http://www.oreillynet.com/pub/a/javascript/excerpt/JSDHTMLCkbk_chap5/index5.html>
*/
function getElementStyle(elementID, CssStyleProperty) {
	var element = document.getElementById(elementID);
	if (element.currentStyle) {
		return element.currentStyle[toCamelCase(CssStyleProperty)];
	} else if (window.getComputedStyle) {
		var compStyle = window.getComputedStyle(element, '');
		return compStyle.getPropertyValue(CssStyleProperty);
	} else {
		return '';
	}
}

/* 
* CamelCases CSS property names. Useful in conjunction with 'getElementStyle()'
* From <http://dhtmlkitchen.com/learn/js/setstyle/index4.jsp>
*/
function toCamelCase(CssProperty) {
	var stringArray = CssProperty.toLowerCase().split('-');
	if (stringArray.length == 1) {
		return stringArray[0];
	}
	var ret = (CssProperty.indexOf("-") == 0)
              ? stringArray[0].charAt(0).toUpperCase() + stringArray[0].substring(1)
              : stringArray[0];
	for (var i = 1; i < stringArray.length; i++) {
		var s = stringArray[i];
		ret += s.charAt(0).toUpperCase() + s.substring(1);
	}
	return ret;
}

/*
* Disables all 'test' links, that point to the href '#', by Ross Shannon
*/
function disableTestLinks() {
	var pageLinks = document.getElementsByTagName('a');
	for (var i = 0; i < pageLinks.length; i++) {
		if (pageLinks[i].href.match(/[^#]#$/)) {
			addEvent(pageLinks[i], 'click', knackerEvent, false);
		}
	}
}

/* 
* Cookie functions
*/
function createCookie(name, value, days) {
	var expires = '';
	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		var expires = '; expires=' + date.toGMTString();
	}
	document.cookie = name + '=' + value + expires + '; path=/';
}

function readCookie(name) {
	var cookieCrumbs = document.cookie.split(';');
	var nameToFind = name + '=';
	for (var i = 0; i < cookieCrumbs.length; i++) {
		var crumb = cookieCrumbs[i];
		while (crumb.charAt(0) == ' ') {
			crumb = crumb.substring(1, crumb.length); /* delete spaces */
		}
		if (crumb.indexOf(nameToFind) == 0) {
			return crumb.substring(nameToFind.length, crumb.length);
		}
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name, '', -1);
}