I didn't notice cflayout tag is just like DIV before. It's not much different between cflayout and DIV. Sometimes, it just like iframe. But, we should know this tag will be useful for future. Here is example for cflayout.
document.getElementById('Center').innerHTML = src;
<cflayout type="border" name="layoutborder">
<cflayoutarea name="Center" position="top" maxSize="200">