JSVAL_DOUBLE       72 extra_lib/include/js/jsapi.h #define JSVAL_IS_DOUBLE(v)      (JSVAL_TAG(v) == JSVAL_DOUBLE)
JSVAL_DOUBLE       86 extra_lib/include/js/jsapi.h #define DOUBLE_TO_JSVAL(dp)     JSVAL_SETTAG((jsval)(dp), JSVAL_DOUBLE)