获取DOM结点上的所有文本(原生版+jQuery)

获取DOM结点下的所有文本(原生版+jQuery)
获取DOM结点下的所有文本(原生版+jQuery)

<div>
    <p>非度蝴蝶无路可走是想都别想村想都别想<em>非度蝴蝶无路可走是想都别想村想都别想</em></p>
</div>
<script type="text/javascript" src="./jquery-1.8b1.js"></script>
<script>
function getInnerText(el) {
    if (typeof el == "string") return el;
    if (typeof el == "undefined") { return el };
    //如果el是DOM结点，除document
    if (el.textContent) return el.textContent; // not needed but it is faster
    if (el.innerText) return el.innerText;     // IE doesn't have textContent
    var str = "";

    var cs = el.childNodes;
    var l = cs.length;
    for (var i = 0; i < l; i++) {
        switch (cs[i].nodeType) {
            case 1: //ELEMENT_NODE
                str += getInnerText(cs[i]);
                break;
            case 3: //TEXT_NODE
                str += cs[i].nodeValue;
                break;
        }
    }
    return str;
}

console.log(getInnerText(document.getElementById('content')));
console.log($('#content').text());
</script>