onclick javascript regrex required on the click of a button : I am looking for the regrex when i click on the button it should be able to perform "Pay Later" action, currently when this button is clicked it display the values in form of parameter to jmeter along with the post.Where i am able to fetch different id by manually adding through csv data but i need a regex for randomly performing the action 

For example 

    <button id="carFlyOutBtn" class="carFlyOutBtn" onclick="javascript:setPayType('0','0',2,1); Analytics.trackEvent('Car Selection','Pay Later',$('#costco_page_name').val());">Pay Later</button>

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/7FPxh.png