javascript - C#. User login-display alert message and provide the location of the u Window.location -

i have different pages, have set them on variable. user can access page have clicked on. so, trying display alert message when user click on sign-in.

string selectedpage = (string)session["selectedpage"] if (selectedpage != null) {  response.write("<script>alert('welcome'); window.location = ????? </script>"); } 

where have set session["selectedpage"]="page-one.aspx"; session["selectedpage"]="page-two.aspx"; in pages.

how can set string/variable in window.loaction? can display alert message , redirect user page.