How do code a 'Withdraw from Study' button with two imbedded links?

For my survey, I used Javascript to insert a 'Withdraw from Study' button into the Footer of my survey. Right now, when that button is clicked, it automatically redirects to one seperate Qualtrics survey link.
This is the code used for the Withdraw Button (with Google.ca as a placeholder for the actual link):
https://www.google.com/" title="Exit Survey" type="button" value="Withdraw" />
I want to know how to code the 'Withdraw from Study' button so that, depending on the response to specific questions within the original survey, the withdraw button will link out to one of two seperate links (i.e., two separate Qualtrics surveys). Which seperate survey participants are redirected to will depend on their answers in the original survey (the one with the withdraw button in it).
Thank you!