Opening a report in a new window and passing parameters to the report

Hello,

I want the action of a textbox to a report in a new window while passing parameters. What am i doing wrong here?

="javascript:void(window.open('http://xxx/ReportServer/Pages/ReportViewer.aspx?%2fManagerscorecards%2fMaterial+Moved&rs:Command=Render&DateDate="+Parameters!DateDate.Value(0)+"&GoalDescription="+Fields!Goal_Description.Value+"&InternalParameters="+Fields!Internal_Reference_Parameters.Value+"'))"

Thanks