$.browser is remove in Jquery 1.9

[ClaudeMa]

http://jquery.com/upgrade-guide/1.9/#jquery-browser-removed

[splinter89]

Just add the following code at the top of your elrte.js:

$.browser = {
    msie: /msie/i.test(navigator.userAgent) && !window.opera
    // safari, opera, mozilla - these are also used
};

or even better - use jquery/jquery-migrate