First of all, it says “&lt;” (which is the html-entity for) “<”
so
window.top.window.stopUpload(<?php echo $result; ?>);
should be
window.top.window.stopUpload(<?php echo $result; ?>);</code

Secondly; not a mistake, but something that might be useful to know, is that there is a shorthand for writing
<? echo $boe; ?>
it goes like this:
<?= $boe; ?gt;

let’s try again:

it says “&lt;” instead of “<”

furthermore you can use “<?=” instead of “<?php echo”.