/*
WM_setCookie(), WM_readCookie(), WM_killCookie()
A set of functions that eases the pain of using cookies.

Source: Webmonkey Code Library
(http://www.hotwired.com/webmonkey/javascript/code_library/)

Author: Nadav Savio
Author Email: nadav@wired.com
*/


// This next little bit of code tests whether the user accepts cookies.
var WM_acceptsCookies = false;
if(document.cookie == '') {
    document.cookie = 'WM_acceptsCookies=yes'; // Try to set a cookie.
    if(document.cookie.indexOf('WM_acceptsCookies=yes') != -1) {
  WM_acceptsCookies = true; 
    }// If it succeeds, set variable
} else { // there was already a cookie
  WM_acceptsCookies = true;
}


function WM_setCookie (name, value, hours, path, domain, secure) {
    if (WM_acceptsCookies) { // Don't waste your time if the browser doesn't accept cookies.
  var not_NN2 = (navigator && navigator.appName 
           && (navigator.appName == 'Netscape') 
           && navigator.appVersion 
           && (parseInt(navigator.appVersion) == 2))?false:true;

  if(hours && not_NN2) { // NN2 cannot handle Dates, so skip this part
      if ( (typeof(hours) == 'string') && Date.parse(hours) ) { // already a Date string
    var numHours = hours;
      } else if (typeof(hours) == 'number') { // calculate Date from number of hours
    var numHours = (new Date((new Date()).getTime() + hours*3600000)).toGMTString();
      }
  }
  document.cookie = name + '=' + escape(value) + ((numHours)?(';expires=' + numHours):'') + ((path)?';path=' + path:'') + ((domain)?';domain=' + domain:'') + ((secure && (secure == true))?'; secure':''); // Set the cookie, adding any parameters that were specified.
    }
} // WM_setCookie


function WM_readCookie(name) {
    if(document.cookie == '') { // there's no cookie, so go no further
  return false; 
    } else { // there is a cookie
  var firstChar, lastChar;
  var theBigCookie = document.cookie;
  firstChar = theBigCookie.indexOf(name); // find the start of 'name'
  var NN2Hack = firstChar + name.length;
  if((firstChar != -1) && (theBigCookie.charAt(NN2Hack) == '=')) { // if you found the cookie
      firstChar += name.length + 1; // skip 'name' and '='
      lastChar = theBigCookie.indexOf(';', firstChar); // Find the end of the value string (i.e. the next ';').
      if(lastChar == -1) lastChar = theBigCookie.length;
      return unescape(theBigCookie.substring(firstChar, lastChar));
  } else { // If there was no cookie of that name, return false.
      return false;
  }
    } 
} // WM_readCookie

function WM_killCookie(name, path, domain) {
  var theValue = WM_readCookie(name); // We need the value to kill the cookie
  if(theValue) {
      document.cookie = name + '=' + theValue + '; expires=Fri, 13-Apr-1970 00:00:00 GMT' + ((path)?';path=' + path:'') + ((domain)?';domain=' + domain:''); // set an already-expired cookie
  }
} // WM_killCookie