JavaScript动态修改网页元素内容的方法

<script type="text/javascript">function showCard() { var message = document.getElementById("CCN").value; var element = document.getElementById("mycreditcardnumber"); element.textContent = message;//for Firefox element.innerHTML = message;//for IE (why can't we all just get along?) return true;}</script><form name="dynamic" method="get"><span>Enter Your Credit Card Number:</span><input type="text" id="CCN" name="CCN" value="CCN" /><input type="button" value="submit" onclick="showCard()" /></form><p>Verify your Credit Card Number: <span id="mycreditcardnumber">0000-00-0000-00 </span></p>