'replaceChild()' Example
<html> <body> <script language="JavaScript"> function function1() { var newElement = document.createElement('u'); newElement.innerHTML = 'Text'; var oldElement = document.all.myBold; document.all.myDiv.replaceChild(newElement, oldElement); } </script> <button onclick="function1();">Replace text</button> <div id="myDiv" style="width:300; height:200; border:solid black 1px;">Sample <b id="myBold">text</b> </div> </body> </html>