How to call a javascript function from a controller

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Javascript

MVC

How to call a javascript function from a controller

For eg:
i have two controllers like A and B

i'm calling Controller 'B' from controller 'A' and i need to return a value 'x' from controller 'B' to 'A' using javascript

i am using
return Content("<script language='javascript' type='text/javascript'>window.location='javascript:history.go(-2)'</script>");
for returning ,so i need to return the value 'x' along with this.

is there any way to include a javascript function inside this??