javascript:(function(){
    var d = document;
    var InsertToggler = function(tr){
        var newa = d.createElement('a');
        newa.appendChild( document.createTextNode("*hide*") );
        newa.onclick = 'toggle(this.parentElement.parentElement.nextElementSibling)';
        tr.firstElementChild.appendChild( newa );
    };

    var e = d.getElementById('replies_table').getElementsByTagName('tr');
    var a, p;
    for(var i = 0; i < e.length; i++){
        a = e[i];
        if( a.className.match(/\breply-body/) ){
            InsertToggler( e[i-1] );
        }
    }
})();