Fixed https://bugs.ecmascript.org/show_bug.cgi?id=288.

test/suite/ch10/10.6/10.6-13-a-2.js

test/suite/ch10/10.6/10.6-13-a-3.js

website/json/ch10.json

website/json/default.json

website/json/testcases_bestPractice.json

website/json/testcases_ch07.json

website/json/testcases_ch08.json

website/json/testcases_ch09.json

website/json/testcases_ch10.json

website/json/testcases_ch11.json

website/json/testcases_ch12.json

website/json/testcases_ch13.json

website/json/testcases_ch14.json

website/json/testcases_ch15.json

website/json/testcases_intl402.json