Function Modify-HttpErrors
{
Param ($Description, $StatusCode, $Path, $ResponseMode, $Action)
 
    If ($Action -eq "Add")
    {
        Set-WebConfiguration -Filter /System.WebServer/HttpErrors/Error[@StatusCode=$StatusCode] -Value @{PrefixLanguageFilePath="$Null"; Path="$Path"; ResponseMode="$ResponseMode"} -PSPath IIS:\ -Location $Description
    }
 
    If ($Action -eq "Remove")
    {
    	Set-WebConfiguration -Filter /System.WebServer/HttpErrors/Error[@StatusCode=$StatusCode] -Value @{PrefixLanguageFilePath="%SystemDrive%\inetpub\custerr"; Path="$StatusCode.html"; ResponseMode="File"} -PSPath IIS:\ -Location $Description
    }
 
    If ($Action -eq "Restore")
    {
    	Clear-WebConfiguration -Filter /System.WebServer/HttpErrors/Error -PSPath IIS:\ -Location $Description
    }
}