Another solution might be to set the sourcing of JavaScript in a timeout, e.g. setTimeout(_sourceJavascript, 300). I think this will bypass the blocking nature. This is only based on my intuition thought - it isn't tested.<p>--<p>It's also important to note that window.onload will only fire when everything is loaded (including scripts and large images). To bypass this problem you should use something like jQuery.ready(document) or Dean Edwards onload hack ( <a href="http://dean.edwards.name/weblog/2005/09/busted/" rel="nofollow">http://dean.edwards.name/weblog/2005/09/busted/</a> ).