Works like a charm dude! I can't thank you enough

You've helped so much.
Here is my fully developed code (added one line to it to automatically scroll back to top after they click submit
Just ONE more thing though. I attempted to put in a code that detects the length of the page in iframe and automatically adjust the iframe to show the full length, however this code did not work. If you are able to update my code below to do that, it would be freakin amazing
Code:
<iframe id="myframe" width=100% height=1000px></iframe>
<form name="this_form" method="POST" action="">
<input type="submit" name="submit4" value="Submit" onclick="loadNextPage(1)">
</form>
<script type="text/javascript">
var cnt=0,webpageArray = [
"http://cnn.com/",
"http://rapidcashgpt.com/",
"http://codingforums.com"
];
var countDown;
function doCountDown( )
{
var btn = document.this_form.submit4;
if ( countDown <= 0 )
{
btn.value = "Submit";
btn.disabled = false;
return;
}
btn.value = "Submit... " + countDown;
btn.disabled = true;
--countDown;
setTimeout( doCountDown, 1000 );
}
function loadNextPage(dir) {
cnt += dir;
// this can never happen: if (cnt<0) cnt=webpageArray.length-1; // wrap
if (cnt>= webpageArray.length) {
return;
}
var iframe = document.getElementById("myframe");
iframe.src = webpageArray[cnt];
countDown = 10;
doCountDown( );
$('html, body').animate({ scrollTop: 0 }, 'fast');
}
loadNextPage(0); // actually loads first page
</script>