SSRS Drill-through report to open in seperate window

Hello

I have a situation where I am passing parameters from main report to drill-through report. Below is my nightmare

When i asked to open in the same window with these parameter settings attached, it works. However, when i use a javacript code below to open in another window, it opens, BUT asks for values to be put in the textboxes again

="javascript:void(window.open('Server/Drill-through report name&rs:Command=Render&ReportDate="+Parameters!ReportDate.Value+"'))"

I am using Visual Studio 2012.

Thank you