Blocks the page by adding a semitransparent white overlay on top of it.
Tento skript by nemal byť nainštalovaný priamo. Je to knižnica pre ďalšie skripty, ktorú by mali používať cez meta príkaz // @require https://update.greatest.deepsurf.us/scripts/468732/1205573/blockPage.js
Use "blockPage()" to block the page and "unblockPage()" to unblock it.