Wondering if anyones got some simple code to update text on an html page after a javascript on click action?

Wondering if anyones got some simple code to update text on an html page after a javascript on click action?
Assuming your text is in a div or something.. give it an id
<div id="blah"> POOO </div>

After the action just do

document.getElementById("blah").innerHTML = "MEOW";

And if I wanted to pull the value out of that text div to put into another field with js, any idea how id pull the value of it?

if you


<div id="blah"> POOO </div>
<div id="bloh"> MEOW </div>

document.getElementById("blah").innerHTML=
document.getElementById("bloh").innerHTML


this will put MEOW at the place of POOO