js childNodes 在傲游浏览器下的表现真诡异

今天做页面的时候要写一个遍历某节点下所有子节点的方法，在IE下一切正常，到遨游的极速模式下就没反应了，

跟踪了半天，是因为遨游下，执行  ctl.parentElement.childNodes 这个对象，找到 33 个子节点，而IE下只找到16个，查看源文件，也只有16个节点，

遨游真TM垃圾啊。。。 用 alert(); 跟踪这33个节点，除了正常的16的节点外，还多出了 17 个 undefine 节点，操。

找到原因就再写个循环把这些莫名多出来的垃圾清理掉就OK了。

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    var forEach = function(array, callback, thisObject) {
        if (array.forEach) {
            array.forEach(callback, thisObject);
        } else {
            for (var i = 0, len = array.length; i < len; i++) { callback.call(thisObject, array[i], i, array); }
        }
    }
    function spweekMouseover(ctl, n) {
        var arrayObj = new Array();
        forEach(ctl.parentElement.childNodes, function(o, i) {
        if (o.tagName == 'DIV')
            arrayObj.push(o);
        });
        forEach(arrayObj, function(o, i) {
            if ((n == (Math.floor(i / 2) + 1) && i % 2 == 0) || (n != (Math.floor(i / 2) + 1) && i % 2 != 0)) {
                o.style.display = "block";
            } else {
                o.style.display = "none";
            }
        });        
    }