wp postratings and w3 validator Errors

I use wp postratings plugin and when i check my site with w3 validator it get 2 errors for this plugin scripts.
how can i make it true?

it’s the errors :

Error HTML5 Validator Error
        Line 289, column 45: Stray start tag script.

        </body></html><script type='text/javascript'>

        Line 289, column 45: Cannot recover after last error. Any further errors will be ignored.

        </body></html><script type='text/javascript'>

and it’s the source code :

</body></html><script type='text/javascript'>
/* <![CDATA[ */
var ratingsL10n = {"plugin_url":"http:\/\/rokesh.ir\/wp-content\/plugins\/wp-postratings","ajax_url":"http:\/\/rokesh.ir\/wp-admin\/admin-ajax.php","text_wait":"Please rate only 1 post at a time.","image":"stars_crystal","image_ext":"gif","max":"5","show_loading":"0","show_fading":"1","custom":"0"};
var ratings_mouseover_image=new Image();ratings_mouseover_image.src=ratingsL10n.plugin_url+"/images/"+ratingsL10n.image+"/rating_over."+ratingsL10n.image_ext;;
/* ]]> */
</script>
<script type='text/javascript' src='http://rokesh.ir/wp-content/plugins/wp-postratings/postratings-js.js'></script>

http://wordpress.org/plugins/wp-postratings/