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working with pre existing code just a simple patch i added ontop
//first get the variables
bridge = namef & valuef
//a paranoid double check
if session("gap") = session("oldgap") then session("gap") = "null"
//the actual comparison
if bridge = session("gap") then
drawbridge = ""
else
drawbridge = inputscrubber("action")
end if
session("oldgap") = session ("gap")
session("gap") = namef & valuef
You should use the PRG (Post/Redirect/Get) pattern to avoid such issues.
The idea is that once the form is posted, you process it and redirect to a different page. The user at this point can refresh without any issue.