Here is the column I am trying to add a link for

colModel : [

{name:'ROWNUMBER',index:'ROWNUMBER',hidden:true},

{name:'CAL_MONTH_STR',index:'CAL_MONTH_STR',formatter:'showlink',formatoptions:{baseLinkUrl:'index.cfm',addParam:'&action=report.revenue-detail',idName:'strMth'}}

]

When I do this I end up with a link that looks like this