on_sent_ok with variables

Thanks for the great plugin

I am trying to send some variable to a third party site, but it isn’t working. I am using

on_sent_ok: “var myFname = $(‘.wpcf7 input[name=first-name]’).val();var myLname = $(‘.wpcf7 input[name=last-name]’).val();location = ‘https://thirdpartysite.com/pre-registration/signup-redirect.html?type=personal&first_name=’+myFname+’last_name=’+myFname;”

Where thirdpartysite.com is the name of the site I am trying to send the user and variables to

Can you please tell me what I am doing wrong

Thanks