If you’re wondering how people create windows which contain text that gets automatically selected or highlighted when someone clicks inside the window, here’s the HTML code:
<textarea name="nameofyourtextarea" rows="4" cols="100"
readonly="readonly" id="idofyourtextarea"
class="cssforyourtextarea" onfocus="this.select()"
style="height:150px;width:300px;">
Your long text (contents of your textarea box)...
</textarea>
And there you go…
The key there is the part that says onfocus=”this.select()”
Have fun!