<SCRIPT>

function tester(form) {
     var percent;
     var correct = 0;    

     if (form[0].checked == true) correct++; // OR if (form.No1[0].checked == true) correct++;
     if (form[3].checked == true) correct++; // OR if (form.No2[1].checked == true) correct++;
     if (form[5].checked == true) correct++; // etc...
     if (form[6].checked == true) correct++;
     if (form[9].checked == true) correct++;

     percent = (correct / 5) * 100;

     if (percent == 100) alert("You got a " + percent + "%. Great Job!");

     if (percent < 100) alert("You got " + correct + " out of 5 correct ( " + percent + "% )");
}

</SCRIPT>

When the Submit button get pressed the onSubmit Event Handler is initiated. onSubmit calls the function tester(this) and also has a return false which causes "nothing" to happen. In other words, return false overwrites the default behavior of submitting the Form's Information to the server.

<FORM onSubmit="tester(this); return false;">

1. George Washington was the first president of the United States.
<INPUT TYPE="radio" NAME="No1">True             <= Correct form[0] or No1[0]
<INPUT TYPE="radio" NAME="No1">False

2. Tucson is the capital of Arizona.
<INPUT TYPE="radio" NAME="No2">True
<INPUT TYPE="radio" NAME="No2">False            <= Correct form[3] or No2[1]

3. Guam is an island in the Caribbean.
<INPUT TYPE="radio" NAME="No3">True
<INPUT TYPE="radio" NAME="No3">False            <= Correct form[5] or No3[1]

4. JavaScript is easier to learn than Java.
<INPUT TYPE="radio" NAME="No4">True             <= Correct form[6] or No4[0]
<INPUT TYPE="radio" NAME="No4">False

5. Mhz refers to how much memory a computer has.
<INPUT TYPE="radio" NAME="No5">True
<INPUT TYPE="radio" NAME="No5">False             <= Correct form[9] or No5[1]

<INPUT TYPE="Submit" VALUE="Get Score"> <INPUT TYPE="Reset" VALUE="Clear">