openX generated JS improvements

gistfile1.js

<script type='text/javascript'><!--//<![CDATA[
  // wrap in an IIFE to not pollute the global name space - also allows 'document', etc, to be minified
  (function( window, document ) {
    document.MAX_used = document.MAX_used || ',';
    // omitting http or https will use whatever is currently being used.
    var m3_u = '//www.domain.com/openx/www/delivery/ajs.php?',
        escape = window.escape,
        // place the params into an array to be joined with the & later
        params = [ 'zoneid=10',
                   'cb=' + Math.floor( Math.random() * +new Date() ),
                   'charset=' + document.charset || docment.characterSet || '',
                   'loc=' + escape( window.location )
                 ];
    document.MAX_used != ',' && params.push( 'exclude=' + document.MAX_used );
    document.referrer && params.push( 'referer=' + escape( document.referrer ) );
    document.context && params.push( 'context=' + escape ( document.context ) );
    document.mmm_fo && params.push( 'mmm_fo=1' );
    // append the final result in ONE doc write
    document.write( '<script src="' + m3_u + params.join( '&amp;' ) + '"><\/script>' );    
  })( window, document );
//]]>--></script><noscript><a href='http://www.domain.com/openx/www/delivery/ck.php?n=a0da2d4d&amp;cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://www.domain.com/openx/www/delivery/avw.php?zoneid=10&amp;cb=INSERT_RANDOM_NUMBER_HERE&amp;n=a0da2d4d' border='0' alt='' /></a></noscript>