how to use two variables in single style variable

[Revathi_M]

Hi anybody explain me,

I have 3 tabs and one export excel button

i written sapare variabels for tabs and export to excel

i am using style variable for active tabs but same time i need eexport to excel only active tab. not other tabs but in HTML its show all tabs

i tryied like this it not working :

Case
When ParamDisplayValue('Param_tabs')='LIST'  or  (ReportOutput() in ( 'XLS','singleXLS'))Then  'LIST'
WHEN When ParamDisplayValue('Param_tabs')='CHART'  or  (ReportOutput() in ( 'XLS','singleXLS'))Then  'CHART' 
When ParamDisplayValue('Param_tabs')='Crosstab' or  (ReportOutput() in ( 'XLS','singleXLS'))Then  'Crosstab'
end

[Ammus1234]

You can create a string variable. It should work. What is the error you are getting?