For most browsers, you delimit the text to be replaced thusly:

    <div ID="testing">MSNBC.com</div>

For IE4, use the following to change the text:

    document.all.testing.innerHTML = "A very cool site!"

For IE5 and Netscape 6, use:

    document.getElementById("testing").innerHTML = "A very cool site!"

For Netscape 4, you must embed the text thusly:

    <ilayer name="testing"><layer name="testing2">MSNBC.com</layer></ilayer>

Then change it using:

    document.testing.document.test2.document.write("A very cool site!")
    document.testing.document.test2.document.close()

---

<div id="example"></div>
<script type="text/javascript">
txt = "some text"
document.getElementById("example").innerHTML=txt;
<script>