When using the Jump to Report action in the web browser, the target report is displayed in the same browser window by default. You can call the JavaScript window.open method to open a new browser window. Use an expression to build a Jump to URL action with the appropriate report server, folders, report name and parameter values. The script to do this might look something like:
=”JavaScript:void window.open(‘http://ReportServerName/ReportServer?/Sales Reports/Product Sales Report&rc:Toolbar=False&ProductID=” & Fields!ProductID.Value & “‘, ‘_blank’, ‘toolbar=0′,scrollbars=0,status=0,location=0,
menubar=0,resizeable=0,directories=0,width=600,height=500,left=550,top=550’);”