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   1  /*******************************************************
   2  COOKIE FUNCTIONALITY
   3  Based on "Night of the Living Cookie" by Bill Dortch
   4  (c) 2003, Ryan Parman
   5  http://www.skyzyx.com
   6  Distributed according to SkyGPL 2.1, http://www.skyzyx.com/license/
   7  *******************************************************/
   8  function cookie(name, value, expires, path, domain, secure)
   9  {
  10      // Passed Values
  11      this.name=name;
  12      this.value=value;
  13      this.expires=expires;
  14      this.path=path;
  15      this.domain=domain;
  16      this.secure=secure;
  17  
  18      // Read cookie
  19      this.read=function()
  20      {
  21          // To allow for faster parsing
  22          var ck=document.cookie;
  23  
  24          var arg = this.name + "=";
  25          var alen = arg.length;
  26          var clen = ck.length;
  27          var i = 0;
  28  
  29          while (i < clen)
  30          {
  31              var j = i + alen;
  32              if (ck.substring(i, j) == arg)
  33              {
  34                  var endstr = ck.indexOf (";", j);
  35                  if (endstr == -1) endstr = ck.length;
  36                  return unescape(ck.substring(j, endstr));
  37              }
  38              i = ck.indexOf(" ", i) + 1;
  39              if (i == 0) break;
  40          }
  41          return null;
  42      };
  43  
  44      // Set cookie
  45      this.set=function()
  46      {
  47          // Store initial value of "this.expires" for re-initialization.
  48          expStore=this.expires;
  49  
  50          // Set time to absolute zero.
  51          exp = new Date();
  52          base = new Date(0);
  53          skew = base.getTime();
  54          if (skew > 0)  exp.setTime (exp.getTime() - skew);
  55          exp.setTime(exp.getTime() + (this.expires*24*60*60*1000));
  56          this.expires=exp;
  57  
  58          document.cookie = this.name + "=" + escape (this.value) +
  59                  ((this.expires) ? "; expires=" + this.expires.toGMTString() : "") +
  60                  ((this.path) ? "; path=" + this.path : "") +
  61                  ((this.domain) ? "; domain=" + this.domain : "") +
  62                  ((this.secure) ? "; secure" : "");
  63  
  64          // Re-initialize
  65          this.expires=expStore;
  66      };
  67  
  68      // Kill cookie
  69      this.kill=function()
  70      {
  71          document.cookie = this.name + "=" +
  72                  ((this.path) ? "; path=" + this.path : "") +
  73                  ((this.domain) ? "; domain=" + this.domain : "") +
  74                  "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  75      };
  76  
  77      // Change cookie settings.
  78      this.changeName=function(chName) { this.kill(); this.name=chName; this.set(); };
  79      this.changeVal=function(chVal) { this.kill(); this.value=chVal; this.set(); };
  80      this.changeExp=function(chExp) { this.kill(); this.expires=chExp; this.set(); };
  81      this.changePath=function(chPath) { this.kill(); this.path=chPath; this.set(); };
  82      this.changeDomain=function(chDom) { this.kill(); this.domain=chDom; this.set(); };
  83      this.changeSecurity=function(chSec) { this.kill(); this.secure=chSec; this.set(); }
  84  }