function getCookie(name) {
 var idx = document.cookie.lastIndexOf(name+'=');
  if(idx == -1) { return null; }
  var value = document.cookie.substring(idx+name.length+1);
  var end = value.indexOf(';');
  if(end == -1) { end = value.length; }
  value = value.substring(0, end);
  value = unescape(value);
  return value;
}

function setCookie (name, value, days, path, domain, secure) {
 var expires = -1;
  if(typeof days == "number" && days >= 0) {
    var d = new Date();
    d.setTime(d.getTime()+(days*24*60*60*1000));
    expires = d.toGMTString();
  }
  value = escape(value);
  document.cookie = name + "=" + value + ";"
    + (expires != -1 ? " expires=" + expires + ";" : "")
    + (path ? "path=" + path : "")
    + (domain ? "; domain=" + domain : "")
    + (secure ? "; secure" : "");
}


function Cookie(name, duration, path, domain, secure)
{
   this.affix = "";
   
   if( duration )
   {   	  
      var date = new Date();
	  var curTime = new Date().getTime();

	  date.setTime(curTime + (1000 * 60 * duration));
	  this.affix = "; expires=" + date.toGMTString();
   }
   
   if( path )
   {
      this.affix += "; path=" + path;
   }
   
   if( domain )
   {
      this.affix += "; domain=" + domain;
   }

   if( secure )
   {
      this.affix += "; secure=" + secure;
   }
   
      
   function getValue()
   {
      var m = document.cookie.match(new RegExp("(" + name + "=[^;]*)(;|$)"));

      return m ? m[1] : null;   
   }
   
   this.cookieExists = function()
   {
      return getValue() ? true : false;
   }
      
   this.expire = function()
   {
      var date = new Date();
	  date.setFullYear(date.getYear() - 1);
	  document.cookie=name + "=noop; expires=" + date.toGMTString(); 
   }
        
   this.setSubValue = function(key, value)
   {
      var ck = getValue();

      if( /[;, ]/.test(value) )
      {
         //Mac IE doesn't support encodeURI
		 value = window.encodeURI ? encodeURI(value) : escape(value);
      }

      
      if( value )
      {
         var attrPair = "@" + key + value;

         if( ck )
         {
             if( new RegExp("@" + key).test(ck) )
	         {
		        document.cookie =
				   ck.replace(new RegExp("@" + key + "[^@;]*"), attrPair) + this.affix;
	         }
	         else
	         {
		        document.cookie =
				   ck.replace(new RegExp("(" + name + "=[^;]*)(;|$)"), "$1" + attrPair) + this.affix;
	         }
         }
         else
         {
	        document.cookie = name + "=" + attrPair + this.affix;
         }
      }
      else
      {      
	     if( new RegExp("@" + key).test(ck) )
	     {
	        document.cookie = ck.replace(new RegExp("@" + key + "[^@;]*"), "") + this.affix;
	     }
      }
   }

      
   this.getSubValue = function(key)
   {
      var ck = getValue();

      if( ck )
      {
         var m = ck.match(new RegExp("@" + key + "([^@;]*)"));

	     if( m )
	     {
	        var value = m[1];

	        if( value )
	        { 
	           //Mac IE doesn't support decodeURI
			   return window.decodeURI ? decodeURI(value) : unescape(value);
	        }
	     }
      }
   }
}