147   return "http://twitter.com/home?status=" + IriSP.encodeURI(text) + IriSP.shorten_url(url);

   147   return "http://twitter.com/home?status=" + IriSP.encodeURI(text) + IriSP.shorten_url(url);

   148 };

   148 };

   149 

   149 

   150 /** returns an url to share on google + */

   150 /** returns an url to share on google + */

   151 IriSP.mkGplusUrl = function(url, text) {

   151 IriSP.mkGplusUrl = function(url, text) {

   153 };

   153 };

   154 

   154 

   155 /** test if a value is null or undefined */

   155 /** test if a value is null or undefined */

   156 IriSP.null_or_undefined = function(val) {

   156 IriSP.null_or_undefined = function(val) {

   157   return (typeof(val) === "undefined" || val === null);

   157   return (typeof(val) === "undefined" || val === null);