JavaScript值由几个单词组成[值=狗疯狂](Javascript Value compose

感谢在这个论坛的帮助下，我能得到我的代码工作：

// ==UserScript==
// @name        PARINGO
// @description Auto select rpt radio button
// @namespace   PARINGO
// @include     https://docs.google.com/spreadsheet/viewform?formkey=dG1fdUU1bTR5R1l3dmtGS095QVYxZlE6MQ
// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// @grant       GM_addStyle
// @version     1
// ==/UserScript==
/*- The @grant directive is needed to work around a design change introduced
    in GM 1.0.   It restores the sandbox.
*/
//-- Note that :contains() is case-sensitive
var questionLabel   = $(
    "label.ss-q-title:contains('How much is 1+1') ~ ul.ss-choices"
).first ().find ("input[type=radio][value=2]");
questionLabel.prop ('checked', true);

var questionLabel   = $(
    "label.ss-q-title:contains('How much is 4+2') ~ ul.ss-choices"
).first ().find ("input[type=radio][value=6]");
questionLabel.prop ('checked', true);

是什么让这个脚本是检查标签和标示正确的答案。但是，如果该响应是由两个或更多个单独的词。没有作品，例如：

var questionLabel   = $(
        "label.ss-q-title:contains('How much is 4+2') ~ ul.ss-choices"
    ).first ().find ("input[type=radio][value=dog crazy]");
questionLabel.prop ('checked', true);

这适用于在谷歌文档的形式：表格谷歌文档

任何人都可以告诉我如何做到这一点的价值接受单独的词？