ie crash my site

hello
my site crash when using ie ( 7 8 ) in firefox work great …
it crash only when i add js code ..
after searching and editing i have found that this code crash the site
<?php $key="videoembed"; echo get_post_meta($post->ID, $key, true); ?>
crash only when i add js code ..

i use this code to embed video from megavideo ..

how can i fix that ?

tnx a lot