Open report link URL in new blank window

I have dynamic links in my report and when the link is clicked I want it to open in `target="_blank"`. I have tried the following, but I must be missing a single or double quote somewhere because I am having no luck. The parameters may be throwing me off. For example, I tried these: ``` ="javascript:void(window.open('http://server/folder/filename.aspx?ds='& Parameters!UserName.Value & '&bu=' & Fields!Business_Unit.Value & '&in=' & Fields!Item_No.Value,'_blank'))" ``` And: ``` ="http://server/folder/filename.aspx?ds="& Parameters!UserName.Value & "&bu="& Fields!Business_Unit.Value & "&in=" & Fields!Item_No.Value &rc:LinkTarget=_blank ``` Any suggestions?