JQuery :: Replace One DIV With Another If Flash Not Found

I was looking at the jquery.flash plugin and it looks like what I need to get the job done but how to do it. Here is some sample code from the plugin site
$('.custom').flash(null, null, function(htmlOptions){
// do stuff
});

Below is the code I tried using:
<script type="text/javascript">
var strToAdd = 'my text to add'
$(document).ready(function(){
$('#flashHere').flash(null, null, function (htmlOptions){
$(".hello").append(strToAdd)
});
}); // END DOCUMENT READY
</script>
In the end what I would really like to do is replace one div with one other if flash is not found, this will make an iPhone friendly version of a site with a lot of flash video on it.