try 
try 
function testDontDelete(F){  var e;  var orig = F.prototype;  try   {    delete F.prototype;  }  catch (e)  {  }  return F.prototype === orig;}
5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5872/3703c3c05f398a63e55992f7687ef65273b26d6a/15.11.7.6-002.js/clean/js/tests/ecma_3/Exceptions/15.11.7.6-002.js