Hi! I revised my code and this is what I came up with because this is what my teacher wanted, but my "submit" button won't work:
html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><center><h1>JavaScript Quiz</center></h1>
<script language="javascript" type="text/javascript" src="Laveen_Demo.html">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</script></head>
<body><form name="CSS">
1. What does CSS stand for?
<p>
<input type="radio" name="Q1" >
Creative Style Sheets
<br>
<input type="radio" name="Q1" >
Computer Style Sheets
<br />
<input type="radio" name="Q1" >
Cascading Style Sheets <br />
<input type="radio" name="Q1" />
Creative Color Sheets
<p>
2. Which type of CSS controls an entire site from one file attribute?
<p>
<input type="radio" name="Q2" >
Inline
+<br>
<input type="radio" name="Q2" >
External <br />
<input type="radio" name="Q2" >
Embedded
<br />
<br />
3. Which type of CSS adds individual html tags in a page by using the "style" attribute?
<p>
<input type="radio" name="Q3" >
Inline <br>
<input type="radio" name="Q3" >
External
<br />
<input type="radio" name="Q3" >
Embedded
<br />
<br />
4. Which type of CSS is used to control the display of elements on an individual page by adding formatting instructions between head tags?
<p>
<input type="radio" name="Q4" >
Inline
<br>
<input type="radio" name="Q4" >
External
<br />
<input type="radio" name="Q4" >
Embedded <br />
<br />
5. Where in an HTML document is the correct place to refer to an external style sheet?
<p>
<input type="radio" name="Q5" >
At the top of the document
<br>
<input type="radio" name="Q5" >
In the head section
<br />
<input type="radio" name="Q5" >
In the body section <br />
<input type="radio" name="Q5" />
At the end of the document
<br />
<br />
6. Which is the correct CSS syntax?
<p>
<input type="radio" name="Q6" >
body {color: black}
<br>
<input type="radio" name="Q6" >
body:color=black
<br />
<input type="radio" name="Q6" >{body:color=black(body}
<br />
<input type="radio" name="Q6" />{body;color:black}}
<p>
7. How do you insert a comment in a CSS file?
<p>
<input type="radio" name="Q7" >
// this is a comment //
<br>
<input type="radio" name="Q7" >
// this is a comment
<br />
<input type="radio" name="Q7" >
' this is a comment <br />
<input type="radio" name="Q7" />
/* this is a comment */
<p>
8. How do you add a background color for all H1 elements?
<p>
<input type="radio" name="Q8" >
h1.all {background-color:#000000}
<br>
<input type="radio" name="Q8" >
h1 {background-color:#000000
<br />
<input type="radio" name="Q8" >
all.h1 {background-color:#000000}
<p>
9. How do you display hyperlinks without an underline?
<p>
<input type="radio" name="Q9" >
a {underline:none}
<br>
<input type="radio" name="Q9" >
a {text-decoration:no underline}
<br />
<input type="radio" name="Q9" >
a {text-decoration:none}<p>
10. How do you change the left margin of an element?
<p>
<input type="radio" name="Q10" >
margin-left
<br>
<input type="radio" name="Q10" >
text-indent
<br />
<input type="radio" name="Q10" >
margin <br />
<input type="radio" name="Q10" />
indent
<p>
11. What is the correct HTML for making a text input field?
<p>
<input type="radio" name="Q11" >
input type="textfield"
<br>
<input type="radio" name="Q11" >
textfield
<br />
<input type="radio" name="Q11" >
input type="text"<br />
<input type="radio" name="Q11" />
text input type="text"
<p>
12. What is the correct HTML for making a checkbox?
<p>
<input type="radio" name="Q12" >
input type="check"
<br />
<input type="radio" name="Q12" >
checkbox
<br />
<input type="radio" name="Q12" >
input type="checkbox"<br>
<input type="radio" name="Q12" >
check
<p>
13. What is the correct HTML for making a drop-down list?
<p>
<input type="radio" name="Q13" >
select
<br>
<input type="radio" name="Q13" >
input type="list"
<br />
<input type="radio" name="Q13" >
input type="dropdown" <br />
<input type="radio" name="Q13" />
list
<p>
14. What is the correct HTML for making a text area?
<p>
<input type="radio" name="Q14" >
input type="textbox"
<br>
<input type="radio" name="Q14" >
textarea
<br />
<input type="radio" name="Q14" >
input type="textarea"<br />
<p>
15. Which attribute specify where to send a form?
<p>
<input type="radio" name="Q15" >
action
<br>
<input type="radio" name="Q15" >
input
<br />
<input type="radio" name="Q15" >
method <br />
<p>
16. Which of the following is not a form field?
<p>
<input type="radio" name="Q16" >
reset button
<br />
<input type="radio" name="Q16" >
radio button <br />
<input type="radio" name="Q16" />
tool box
<p>
17. What tells the browser where the form starts and ends?<p>
<input type="radio" name="Q17" >
access
<br>
<input type="radio" name="Q17" >
form
<br />
<input type="radio" name="Q17" >
span <br />
<p>
18. Password fields are similar to what?<p>
<input type="radio" name="Q18" >
Text fields except text show as asterix
<br>
<input type="radio" name="Q18" >
Text area except text show as asterix
<br />
<input type="radio" name="Q18" >
Hidden fields except text show as asterix <br />
<p>
19. One line areas that allow the user to input text are called?<p>
<input type="radio" name="Q19" >
Text area
<br>
<input type="radio" name="Q19" >
Text field<br />
<input type="radio" name="Q19" >
Written field <br />
<p>
20. The value setting of a text field defines what? <p>
<input type="radio" name="Q20" >
If the value entered is a proper value
<br>
<input type="radio" name="Q20" >
The length of the field <br />
<input type="radio" name="Q20" />
What will appear in the field as the default value
<p>
21. What is the correct JavaScript syntax to write "Welcome"?
<p>
<input type="radio" name="Q21" >
"Welcome"
<br>
<input type="radio" name="Q21" >
response.write("Welcome")
<br />
<input type="radio" name="Q21" >
("Welcome")
<br />
<input type="radio" name="Q21" />
document.write("Welcome")
<p>
22. Where is the correct place to insert a JavaScript?
<p>
<input type="radio" name="Q22" >
The head section
<br>
<input type="radio" name="Q22" >
The body section
<br />
<input type="radio" name="Q22" >
Both the head section and the body section are correct
<br />
<p>
23. How do you write "Hello World" in an alert box?
<p>
<input type="radio" name="Q23" >
alertBox("Hello World")
<br>
<input type="radio" name="Q23" >
msgBox("Hello World")
<br />
<input type="radio" name="Q23" >
alert("Hello World")
<br />
<input type="radio" name="Q23" />
alertBox="Hello World"
<p>
24. How do you call a function named "myFunction"?
<p>
<input type="radio" name="Q24" >
myFunction()
<br>
<input type="radio" name="Q24" >
call myFunction()
<br />
<input type="radio" name="Q24" >
call function myFunction
<br />
<p>
25. How do you write a conditional statement for executing some code if "x" is equal to 6?
<p>
<input type="radio" name="Q25" >
if x=6 then
<br>
<input type="radio" name="Q25" >
if x=6
<br />
<input type="radio" name="Q25" >
if x==6 then
<br />
<input type="radio" name="Q25" />
if (x==6)
<p>
26. How do you create a function?
<p>
<input type="radio" name="Q26" >
function myFunction()
<br>
<input type="radio" name="Q26" >
function=myFunction()
<br />
<input type="radio" name="Q26" >
function:myFunction()
<br />
<p>
27. What is a variable?
<p>
<input type="radio" name="Q27" >
A method that is often used to display information
<br>
<input type="radio" name="Q27" >
A container for storing information
<br />
<input type="radio" name="Q27" >
A self-contained routine that performs instructions
<br />
<input type="radio" name="Q27" />
The way values are assigned to variables
<p>
28. Which of these is not a correct operator?
<p>
<input type="radio" name="Q28" >
!
<br>
<input type="radio" name="Q28" >
||
<br />
<input type="radio" name="Q28" >
&&
<br />
<input type="radio" name="Q28" />
|
<p>
29. When saving an external JavaScript files, which extension do you use?
<p>
<input type="radio" name="Q29" >
.ext
<br>
<input type="radio" name="Q29" >
.css
<br />
<input type="radio" name="Q29" >
.js
<br />
<input type="radio" name="Q29" />
.java
<p>
30. Which converts a string to floating point numbers?
<p>
<input type="radio" name="Q30" >
eval
<br>
<input type="radio" name="Q30" >
ParseFloat
<br />
<input type="radio" name="Q30" >
ParseInt
<br />
<input type="radio" name="Q30" />
None of the above
<p>
</form>
<center>
<form>
<input type="button" value="Submit" onclick="Check()" />
</form>
</center>
</body>
</html>
______________________________________________________
JavaScript
// JavaScript Document
var score=0;
var wrong="";
function Check()
{
if (CSS.Q1[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q1, ";
}
if (CSS.Q2[1].checked)
{
score++;
}
else
{
wrong=wrong+"Q2, ";
}
if (CSS.Q3[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q3, ";
}
if (CSS.Q4[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q4, ";
}
if (CSS.Q5[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q5, ";
}
if (CSS.Q6[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q6, ";
}
if (CSS.Q7[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q7, ";
}
if (CSS.Q8[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q8, ";
}
if (CSS.Q9[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q9, ";
}
if (CSS.Q10[1].checked)
{
score++;
}
else
{
wrong=wrong+"Q10, ";
}
if (CSS.Q11[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q11, ";
}
if (CSS.Q12[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q12, ";
}
if (CSS.Q13[1].checked)
{
score++;
}
else
{
wrong=wrong+"Q13, ";
}
if (CSS.Q14[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q14, ";
}
if (CSS.Q15[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q15, ";
}
if (CSS.Q16[1].checked)
{
score++;
}
else
{
wrong=wrong+"Q16, ";
}
if (CSS.Q17[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q17, ";
}
if (CSS.Q18[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q18, ";
}
if (CSS.Q19[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q19, ";
}
if (CSS.Q20[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q20, ";
}
if (CSS.Q21[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q21, ";
}
if (CSS.Q22[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q22, ";
}
if (CSS.Q23[1].checked)
{
score++;
}
else
{
wrong=wrong+"Q23, ";
}
if (CSS.Q24[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q24, ";
}
if (CSS.Q25[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q25, ";
}
if (CSS.Q26[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q26, ";
}
if (CSS.Q27[1].checked)
{
score++;
}
else
{
wrong=wrong+"Q27, ";
}
if (CSS.Q28[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q28, ";
}
if (CSS.Q29[0].checked)
{
score++;
}
else
{
wrong=wrong+"Q29, ";
}
if (CSS.Q30[2].checked)
{
score++;
}
else
{
wrong=wrong+"Q30, ";
}
alert("You got "+score/30*100+"%");
alert("You got "+wrong+" wrong.");
}
My submit button would not work, I don't know what is wrong with it. 
Please help! Thank you again.