解决jquery1.9以上的browser问题

(function($){
var userAgent=navigator.userAgent.toLowerCase();
    // Figure out what browser is being used
    $.browser = {
        version: (userAgent.match( /.+(?:rv|it|ra|ie)[/: ]([d.]+)/ ) || [])[1],
        safari: /webkit/.test( userAgent ),
        opera: /opera/.test( userAgent ),
        msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
        mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
    };
})(jQuery);