code: function isScriptLoaded(elem,scriptentry) {
  			if ((elem[sREADYSTATE] && elem[sREADYSTATE]!==sCOMPLETE && elem[sREADYSTATE]!=="loaded") || scriptentry[sDONE]) { return bFALSE; }
  			elem[sONLOAD] = elem[sONREADYSTATECHANGE] = nNULL; // prevent memory leak
  			return bTRUE;
  		}
docs: if all flags are turned off, preload is moot so disable it