open url link in new window

Question

I have seen several posts about opening a url link in a new window, but have not seen anybody that has successfully gotten this to work.  I have see the syntax of ="javascrippt:void(window.open('http://...','_blank'))" but this does not help me much.  Here is my current link:

="http://someserver/PDFViewer/default.aspx?Param1=" & Fields!param1.Value & "&Param2=" & Fields!param2.Value & "&Param3=" & Fields!param3.Value & "&Param4=" & Fields!param4.Value & "&Param5=" & Fields!param5.Value & "&Param6=" & Fields!param6.Value

Can anyone use the link I gave and add in the _blank part??  I guess I just can't get the syntax right with all of my parameters.  Any help would be appreciated.