function doSearch(extra) { site=document.getElementById('site').value; base='search'; if(site=='Mac') base='mac'; if(site=='Linux') base='linux'; if(site=='BSD') base='bsd'; if(site=='U.S. Government') base='unclesam'; url='http://www.google.com/'+base+'?q='+escape(document.getElementById('q').value)+'&sourceid=mozilla-xul'+extra; window._content.location=url; }