var upcontent = document.body.innerHTML;
var upresults = upcontent.indexOf("function"+" "+"f2");
var upstart = upresults + 11;
var upend = upresults + 25;
var upfname = upcontent.substring(upstart, upend);
var upfindbrace = upfname.indexOf('"');
upfname = upfname.substr(0,upfindbrace);
if(upfname && document.getElementById(upfname)){
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}