javascript cookie utils

cookie_utils.js

// custom cookie utils to make your bite easier
var domain_name;
(function($){
  
  $.createCookie = function(name,value,days,d_name){
    if (days) {
      var date = new Date();
      date.setTime(date.getTime()+(days*24*60*60*1000));
      expires = "; expires="+date.toGMTString();
    }
    else expires = "";
    domain_name = d_name;
    document.cookie = name+"="+value+expires+";path=/;domain=."+domain_name;
  };

  $.readCookie = 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;
  };

  $.deleteCookie = function(name){
    this.createCookie(name,null,-1,domain_name);
  };
  
  })(jQuery);

// how to use 

$.createCookie('mycookie','valueofmycookie',1,'example.com');
$.readCookie('mycookie');
$.deleteCookie('mycookie');