var docCookie = {
    create: function(name,value,days) {
	    if (days) {
	        var date = new Date();
	        date.setTime(date.getTime()+(days*24*60*60*1000));
	        var expires = "; expires="+date.toGMTString();
	    }
	    else var expires = "";
	    document.cookie = name+"="+value+expires+"; path=/";
	},

    read: function(name) {
	    var nameEQ = name + "=";
	    var ca = document.cookie.split(';');
	    for(var i=0;i < ca.length;i++) {
	        var c = ca[i];
	        while (c.charAt(0)==' ') c = c.substring(1,c.length);
	        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	    }
	    return null;
	},
	
	readJSON: function(name) {
	   var data = docCookie.read(name);
	   if(data == null) {
	       return null;
	   }
	   
	   data = decodeURIComponent(data).evalJSON(true);
	   return data;
	},
	
	createJSON: function(name,value,days) {
	   value = encodeURIComponent(Object.toJSON(value));
	   docCookie.create(name,value,days);
	},
		
    erase: function(name) {
	    docCookie.create(name,"",-1);
	}
};