Excuse my bluntness, but the problem with the previous questions on this subject were the OPs inability to follow directions rather than the answers given. Here it is one more time:
1) Add the embedded variable to your survey flow before the question block:
clicked = 0
2) Add the link to your question text (in HTML mode):
This is a link: <a href="http://www.google.com" target="_blank" id="extLink">Click here</a>
3) Add the following JavaScript to your question where "extLink" matches the id of your link in (2) and "clicked" matches the embedded variable in (1).
Qualtrics.SurveyEngine.addOnload(function() {
$('extLink').on('click', function(name, event) {
Qualtrics.SurveyEngine.setEmbeddedData('clicked', '1');
});
});
If it doesn't work, you are doing something wrong. Here is a survey that shows it works: https://marketinview.qualtrics.com/jfe5/preview/SV_02JbXhz8qyHgv2d
Click on the next button (>>) on the first page to see the value of 'clicked' on the next page.