Making an two images automatically alternate

[econthecape]

I have two .gif images that I want to automatically alternate instead of only on a mouseover. Here's the coding so far:

[HTML]<CENTER>
<A HREF="http://en.wikipedia.or g/wiki/Christmas"
onmouseover="do cument.mybutton 2.src='redgreen .gif';"
onmouseout="doc ument.mybutton2 .src='greenred. gif';"><BR>
<IMG SRC="greenred.g if" width="600" height="150"
border="0" name="mybutton2 "></A>
</CENTER>
[/HTML]
Anyone know how to make it on a timer or something to auto switch the images?

[acoder]

Use setInterval.