How Do I Get A Pop Up Like This?

I was wondering if anyone knows how to make a pop up appear like the one in the following URL. Do not worry its just to register for a free e-book so no viruses.

http://www.savagemarketing.com/64000/

 

Thats a Java script

<script type="text/javascript" language="JavaScript">

var top = -500;

function AnimateFloater()
{
top = top + 15;

document.getElementById('floater_container').style.top = top + 'px';

if (top < 50)
{
setTimeout('AnimateFloater()',50);
}
}

function RemoveContent() {
var elementStyle = document.getElementById('floater_container').style;
elementStyle.display = "none";
}

function verifyRequired() {
if (document.icpsignup["fields_fname"].value == "") {
document.icpsignup["fields_fname"].focus();
alert("The Name field is required.");
return false;
}
if (document.icpsignup["fields_email"].value == "") {
document.icpsignup["fields_email"].focus();
alert("The Email field is required.");
return false;
}

return true;
}
</script>

Just Look for it in the view source in your browser

 

And you are putting the text you want to float like this:

<div id="floater_container">That`s the "pop-up" content</div>

Code (markup):

 

Forgot to add taht thanks joseph S

 

I have a separate page that I want to pop up in the floater. It is an image + text + a sign up to receive newsletter form. I want it to fit in the floater.