//these are generic cookie functions
function Cookies(){
/*
   name - name of the cookie
   value - value of the cookie
   [expires] - expiration date of the cookie
     (defaults to end of current session)
   [path] - path for which the cookie is valid
     (defaults to path of calling document)
   [domain] - domain for which the cookie is valid
     (defaults to domain of calling document)
   [secure] - Boolean value indicating if the cookie transmission requires
     a secure transmission
   * an argument defaults when it is assigned null as a placeholder
   * a null placeholder is not required for trailing omitted arguments
*/
	this.setCookie = function(name, value, expires, path, domain, secure) {
  		
		var xtime = new Date(expires);
  		var curCookie = name + "=" + escape(value) +
      		((expires) ? "; expires=" + xtime.getUTCDate() : "") +
      		((path) ? "; path=" + path : "") +
      		((domain) ? "; domain=" + domain : "") +
      		((secure) ? "; secure" : "");
 		 document.cookie = curCookie;
	};


/*
  name - name of the desired cookie
  return string containing value of specified cookie or null
  if cookie does not exist
*/
	this.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));
	};


/*
   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)
   path and domain default if assigned null or omitted if no explicit
     argument proceeds
*/
	this.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";
  		}
	};

// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"
	this.fixDate = function(date) {
  		var base = new Date(0);
  		var skew = base.getTime();
  		if (skew > 0)
    		date.setTime(date.getTime() - skew);
	};

}