/*
 * @author              Andrea Giammarchi
 * @site		www.devpro.it
 * @date                2005/12/19 11:00
 * @lastmod             2005/12/19 11:00
 * @credits		Special thanks to Dustin Diaz
 *			[ http://www.dustindiaz.com/top-ten-javascript/ ]
 * @version             1.0 tested FireFox 1.5, IE 6 SP2 and Opera 8
 */
var Cookie = {

	/**
	 * public method, returns value for chosed name or false if is not present
	 *	Cookie.get( cookiename:String ):String
	 * @param	String		name of saved cookie
	 * @return	String		value saved with chosed name
	 */
	get: function(name) {
		var dc = document.cookie;
		var cl = dc.indexOf(name+'=')+name.length;
		if(++cl > name.length) {
			var ce = dc.indexOf(';',cl);
			if(ce == -1)
				ce = dc.length;
			cl = unescape(dc.substr(cl,(ce-cl)));
		}
		else
			cl = false;
		return cl;
	},
	
	/**
	 * public method, sets a cookie
	 *	Cookie.set( name:String, value:Mixed[, exp:Int[, path:String[, domain:String[, secure:Boolean ]]]]):Void
	 * @param	String		name of cookie
	 * @param	Mixed		cookie value
	 * @param	Int		expiration date ( 0, 1, ... N days )
	 * @param	String		valid path for this cookie
	 * @param	String		domain for this cookie
	 * @param	Boolean		secure ( for example in https sites )
	 */
	set: function(name, value, exp, path, domain, secure) {
		var c = new Array();
		c.push(name + '=' + escape(value));
		var e = (exp > 0);
		if(e) {
			var n = new Date();
			exp = new Date(n.getTime()+(exp*86400000));
			c.push('expires='+exp.toGMTString());
		}
		if(path){c.push('path='+path);}
		if(domain){c.push('domain='+domain);}
		if(secure){c.push('secure');}
		document.cookie = c.join(';');
	},
	
	/**
	 * public method, removes a cookie if present.
	 *	Cookie.unset( name:String[, path:String[, domain:String]] ):Boolean
	 * @param	String		saved cookie name
	 * @param	String		path used for this cookie
	 * @param	String		domain used for this cookie
	 * @return	Boolean		true if was present and is removed or false
	 */
	unset: function(name, path, domain) {
		var result = this.get(name);
		if(result != false) {
			var c = new Array();
			c.push(name + '=');
			if(path){c.push('path=' + path);}
			if(domain){c.push('domain=' + domain);}
			c.push('expires=Thu, 01-Jan-1970 00:00:01 GMT');
			document.cookie = c.join(';');
		}
		return !!result;
	}
}