display Iview dynamically based on url param.

Hi All,

I have developped an appliacation in that I have two Views I want to display those are dynamically based on param.

The param is coming from the portal.

I want to display my iviews like this.

if(param=yes)

display ViewOne.

else

displayViewTwo.

And secong this is

I have a dropdown it has four elements Whether first View is displayed the second value is only visible that I have done But user can not do any thing on that how can I do that.I mean to say we are not giving chance to do any changes on dropdown.

Please suggest me how to do this.

Thanks

Lohi.