Javascript DOMѧϰ±Ê¼Ç2

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document.createElement(nodename)
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parent.appendChild(child)
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document.createTextNode(text)
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parentElement.insertBefore(newElement,targetElement)
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parentElement.insertAfter(newElement,targetElement)
parentElement.insertAfter(newElement,targetElement)
function insertAfter(newElement,targetElement)
{
var parent = targetElement.parentNode;
if (parent.lastChild == targetElement)
{
parent.appendChild(newElement);
}
else
{
parent.insertBefore(newElement,targetElement.nextSibling);
}
}