Autohider in JS

autohider.user.js

$.each(
    $.grep(
        $(".l_expandcomments"), 
        function(e) {
            var m = /(\d+) more comments/.exec(e.innerHTML); 
            return m && parseInt(m[1]) > 10;
        }), 
    function() { 
        $(".l_hideone", $(this).parents(".l_entry"))
                .click(); 
    });