您当前的位置: 在上一节，编写main.css的时候，是把整个quiz隐藏起来了，而这里把隐藏的题目一个一个列举出来，
把main.css改为
body{
margin-left:50px;
}
#question1, #question2, #question3, #question4, #question5,
#question6, #question7, #question8, #question9, #question10
{
display:none;
}
然后再编写一个文件game.js
if(jQuery){
$("#question1").show();
}
index.html内容如下
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Quiz</title>
<!--在本目录下，加入了main样式-->
<link rel="stylesheet" type="text/css" href="main.css">
</head>
<body>
<h1>Quiz</h1>
<div id="quiz"><!--此id用在main样式表中-->
<div id="question1">
<div class="question">Which is not a main file type that we use to make websites?</div>
<input type="radio" name="question1" value="a"/>
<label>.html</label>
<input type="radio" name="question1" value="b"/>
<label>.exe</label>
<input type="radio" name="question1" value="c"/>
<label>.js</label>
<input type="radio" name="question1" value="d"/>
<label>.css</label>
</div>
<br />
<div id="question2">
<div class="question">A JavaScript object is wrapped by what charaters?</div>
<input type="radio" name="question2" value="a"/>
<label>[]</label>
<input type="radio" name="question2" value="b"/>
<label>;;</label>
<input type="radio" name="question2" value="c"/>
<label>{}</label>
<input type="radio" name="question2" value="d"/>
<label>()</label>
</div>
<br />
<div id="question3">
<div class="question">Moles are which of the following?</div>
<input type="radio" name="question3" value="a"/>
<label>Omniverous</label>
<input type="radio" name="question3" value="b"/>
<label>Adorable</label>
<input type="radio" name="question3" value="c"/>
<label>Whackable</label>
<input type="radio" name="question3" value="d"/>
<label>All of the above</label>
</div>
<br />
<div id="question4">
<div class="question">In Japanese "か" is prounounced...</div>
<input type="radio" name="question4" value="a"/>
<label>ka</label>
<input type="radio" name="question4" value="b"/>
<label>ko</label>
<input type="radio" name="question4" value="c"/>
<label>ke</label>
<input type="radio" name="question4" value="d"/>
<label>ki</label>
</div>
<br />
<div id="question5">
<div class="question">The gravitational constant on earth is approximately...</div>
<input type="radio" name="question5" value="a"/>
<label>10m/s^2</label>
<input type="radio" name="question5" value="b"/>
<label>.809m/s^2</label>
<input type="radio" name="question5" value="c"/>
<label>9.81m/s^2</label>
<input type="radio" name="question5" value="d"/>
<label>84.4m/s^2</label>
</div>
<br />
<div id="question6">
<div class="question">45 (in base 10) is what in binary (base 2)?</div>
<input type="radio" name="question6" value="a"/>
<label>101101</label>
<input type="radio" name="question6" value="b"/>
<label>110011</label>
<input type="radio" name="question6" value="c"/>
<label>011101</label>
<input type="radio" name="question6" value="d"/>
<label>101011</label>
</div>
<br />
<div id="question7">
<div class="question">4 << 22 = ...</div>
<input type="radio" name="question7" value="a"/>
<label>16</label>
<input type="radio" name="question7" value="b"/>
<label>4</label>
<input type="radio" name="question7" value="c"/>
<label>2</label>
<input type="radio" name="question7" value="d"/>
<label>8</label>
</div>
<br />
<div id="question8">
<div class="question">Given the lengths of two sides of a right triangle (one with a 90 degree angle), how would you find the hypotenuse?</div>
<input type="radio" name="question8" value="a"/>
<label>Pi*Radius^2</label>
<input type="radio" name="question8" value="b"/>
<label>Pythagorean Theorem</label>
<input type="radio" name="question8" value="c"/>
<label>Calculator?</label>
<input type="radio" name="question8" value="d"/>
<label>Sin(side1 + side2)</label>
</div>
<br />
<div id="question9">
<div class="question">True or False: All games must run at at least 60 frames per second to be any good.</div>
<input type="radio" name="question9" value="a"/>
<label>True</label>
<input type="radio" name="question9" value="b"/>
<label>False</label>
</div>
<br />
<div id="question10">
<div class="question">Using a server can help you to...</div>
<input type="radio" name="question10" value="a"/>
<label>hide your code.</label>
<input type="radio" name="question10" value="b"/>
<label>have a performant game.</label>
<input type="radio" name="question10" value="c"/>
<label>create shared experiences for players.</label>
<input type="radio" name="question10" value="d"/>
<label>all of the above.</label>
</div>
</div>
<script src="jquery.js"/>
<script src="game.js"/>
</body>
</html>
上方粗体，斜体是加在上一节代码里。
在main.css中，其他可以不用一个一个地隐藏，也可以使用类选择器。
上方的jquery.js在网上下载即可