JavaScript Compression Problem

I have the following compressed script to load sharethis buttons and a Google search box asynchronously:

  <script> 
      ( function (w, d, load) { var script, first = d.getElementsByTagName('SCRIPT')[0], n = load.length, i = 0, go = function () { for (i = 0; i < n; i = i + 1) { script = d.createElement('SCRIPT'); script.type = 'text/javascript'; script.async = true; script.src = load[i]; first.parentNode.insertBefore(script, first); } } 
      if (w.attachEvent) { w.attachEvent('onload', go); } else { w.addEventListener('load', go, false); } } ( window, document, [ 'http://w.sharethis.com/button/buttons.js', 'http://www.google.com/coop/cse/brand?form=cse-search-box&amp;lang=en' ] ) ); 
  </script>

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This works fine and my sharethis buttons load and show up on the page. However, my HTML compressor program actually places the second long script line starting with if (w.attachEvent) up next to the first script line and when it does that, my sharethis buttons don't show up on the page. Why would that be and is there a way that I could edit the JavaScript code so that my compression program wouldn't cause sharethis not to work?