Global.evalURL (url)
function checks if url is correct if not it assumes that http is the protocol

Sourcecode in Global/objectFunctions.js:
1:   function evalURL(url) {
2:      if (!url || url.contains("://") || url.contains("mailto:"))
3:         return url;
4:      if (url.contains("@"))
5:         return "mailto:" + url;
6:      else
7:         return "http://" + url;
8:   }