GO To URL Action - Pass Parameters SSRS

Hello!

I am trying to use the Go To URL action to open up another report and also pass the parameters stipulated by the user in the "Parent" report to the "Child" report.  

I added the code below to a text box on the main report and it opens the Service Call Proposal-TAGR report successfully.  Now I just need to pass the parameters in the URL as well and I don't know the syntax for doing that.  Any help would be appreciated.  Thanks!

javascript:void(window.open('http://sql-server11/Reports/report/TRC/Signature Service/Service Call Proposal-TAGR' ,' _blank'))