^https?://.+$
. Until this contains a valid entry, the Save entry button at the top of the page will be disabled, and the control will be highlighted in red.^[0-9a-zA-Z-_]+$)
, and are mandatory. Until they contain valid entries, the Save entry button at the top of the page will be disabled, and the invalid control(s) will be highlighted in red.^[1-5][0-9][0-9]$
) and both Header fields (as regular expressions ^[0-9a-zA-Z-_]+$
) are mandatory. Until they contain valid entries, the Save entry button at the top of the page will be disabled, and the invalid control(s) will be highlighted in red.