/*
	Client-side cookie manager
	Version 1.0 | October 23, 2008
	Author: Kaitlyn McLachlan <kaitlyn@clearskymedia.ca>
	Website: http://www.clearskymedia.ca
*/

var CookieManager = {
	/**
	 * Sets a Cookie with the given name and value.
	 *
	 * name       Name of the cookie
	 * value      Value of the cookie
	 * [expires]  Expiration date of the cookie (default: end of current session)
	 * [path]     Path where the cookie is valid (default: path of calling document)
	 * [domain]   Domain where the cookie is valid
	 *              (default: domain of calling document)
	 * [secure]   Boolean value indicating if the cookie transmission requires a
	 *              secure transmission
	 */
	setCookie : function (name, value, expires, path, domain, secure) {
	    document.cookie = name + "=" + escape(value) +
	        ((expires) ? "; expires=" + expires.toGMTString() : "") +
	        ((path) ? "; path=" + path : "") +
	        ((domain) ? "; domain=" + domain : "") +
	        ((secure) ? "; secure" : "");
	},
	
	/**
	 * Gets the value of the specified cookie.
	 *
	 * name  Name of the desired cookie.
	 *
	 * Returns a string containing value of specified cookie,
	 *   or null if cookie does not exist.
	 */
	getCookie : function (name) {
	    var dc = document.cookie;
	    var prefix = name + "=";
	    var begin = dc.indexOf("; " + prefix);
	    if (begin == -1) {
	        begin = dc.indexOf(prefix);
	        if (begin != 0) {
				return null;
			}
	    } else {
	        begin += 2;
	    }
	    var end = document.cookie.indexOf(";", begin);
	    if (end == -1) {
	        end = dc.length;
	    }
	    return unescape(dc.substring(begin + prefix.length, end));
	},
	
	/**
	 * Deletes the specified cookie.
	 *
	 * name      name of the cookie
	 * [path]    path of the cookie (must be same as path used to create cookie)
	 * [domain]  domain of the cookie (must be same as domain used to create cookie)
	 */
	deleteCookie : function(name, path, domain) {
	    if (getCookie(name)) {
	        document.cookie = name + "=" +
	            ((path) ? "; path=" + path : "") +
	            ((domain) ? "; domain=" + domain : "") +
	            "; expires=Thu, 01-Jan-70 00:00:01 GMT";
	    }
	}
}