1) The simplest solution is to have 2 versions of the drop-down question. Show the appropriate question via relevance based on the Yes/No question.
2) There is no question validation equation for drop-downs so you'll have to write your own validation in JavaScript. Something like this in the source of one of the questions:
2) There is no question validation equation for drop-downs so you'll have to write your own validation in JavaScript. Something like this in the source of one of the questions:
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
var q1Dropdown = $('select[id$="X{Q1.qid}"]');
var q2Dropdown = $('select[id$="X{Q2.qid}"]');
$('#movenextbtn, #movesubmitbtn').click(function(e) {
var alertText;
var moveAllowed = true;
if(q1Dropdown.val() == 1 && q2Dropdown.val() != 0) {
alertText = 'If Q1 is 1 then Q2 has to be 0';
moveAllowed = false;
}
if(q2Dropdown.val() == 1 && q1Dropdown.val() != 0) {
alertText = 'If Q2 is 1 then Q1 has to be 0';
moveAllowed = false;
}
if(moveAllowed == false) {
e.preventDefault();
alert(alertText);
return false;
}
});
});
</script>