java script side widget problem

If I add as a html side widget this code I get error, well this code interfere with the following codes, precisely doesn’t allow footer to display.
Here the code I’d like to use as right side widget:

<!--  ADVERTISEMENT TAG 160 x 600, DO NOT MODIFY THIS CODE -->
<script type="text/javascript">
<!--
document.write('<iframe marginheight="0px" marginwidth="0px" frameborder="0" scrolling="no" width="160" height="600" src="https://optimized-by.simply.com/play.html?code=170107;61415;57339;0&from='+escape(document.referrer)+'"></iframe>');
// -->
</script>

Moreover this code doesn’t show at all:

<script type="text/javascript">
simply_publisher = 57339;
simply_domain = 61415;
simply_space = 170107;
simply_ad_height = 600;
simply_ad_width = 160;
simply_callback = '';
</script>
<script type="text/javascript">
var cb = Math.round(new Date().getTime());
document.write('<scr'+'ipt type="text/javascript" src="'+ ('https:' == document.location.protocol ? 'https://' : 'https://') + 'optimized-by.4wnetwork.com/simply_loader.js?cb='+ cb +'"></scr' + 'ipt>');
</script>

thanks