Ah yes! I see! It's working now.
Here are my codes if others need help with the same sort of situation:
CODE FOR FIRST QUESTION
<script type="text/javascript">
<!--
var optionAa = document.getElementById("SE03_01a");
var optionBb = document.getElementById("SE03_02a");
var question1 = document.getElementById("SE04_qst");
function toogle1() {
if (optionAa.checked) {
question1.style.display = "";
} else {
question1.style.display = "none";
}
}
SoSciTools.attachEvent(optionAa, "click", toogle1);
SoSciTools.attachEvent(optionBb, "click", toogle1);
toogle1();
// -->
</script>
CODE FOR THE SECOND QUESTION ON PAGE
<script type="text/javascript">
<!--
var optionA = document.getElementById("SE10_02a");
var optionB = document.getElementById("SE10_03a");
var question = document.getElementById("SE11_qst");
function toogle2() {
if (optionA.checked) {
question.style.display = "";
} else {
question.style.display = "none";
}
}
SoSciTools.attachEvent(optionA, "click", toogle2);
SoSciTools.attachEvent(optionB, "click", toogle2);
toogle2();
// -->
</script>