A javascript cookie module

CookieMonster

<script>
var CookieMonster = (function() {
  
  return {
    checkCookie: checkCookie,
    getCookie: getCookie,
    setCookie: setCookie,
    deleteCookie: deleteCookie
  };
  
  function checkCookie(cname) {
    return getCookie(cname) != "";
  }
  
  function setCookie(cname, cvalue, exdays) {
    var d = new Date();
    d.setTime(d.getTime() + (exdays*24*60*60*1000));
    var expires = "expires="+d.toUTCString();
    document.cookie = cname + "=" + cvalue + "; " + expires;
  }

  function getCookie(cname) {
    var name = cname + "=";
    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);
        if (c.indexOf(name) == 0) return c.substring(name.length, c.length);
    }
    return "";
  }
  
  function deleteCookie(cname) {
    setCookie(cname, '', -5);
  }
})();
</script>