rem: return; 
add: return null; 
context: Nevow.Athena._walkDOM = function(parent, test, memo) {    if (memo == undefined) {        memo = [];    }    /* alert(parent); */    if ((parent == undefined) ||        (parent.childNodes == undefined)) {        return;    }    var child;    var len = parent.childNodes.length;    for (var i = 0; i < len; i++) {        child = parent.childNodes[i];        if (test(child)) {            memo.push(child);        }        Nevow.Athena._walkDOM(child, test, memo);    }    return memo;};
meta: 1565	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1565/9cf6c6a22ec0c9179873c1bd4edb31a188172fed/athena.js/clean/nevow/athena.js