Blocks the page by adding a semitransparent white overlay on top of it.
Este script no debería instalarse directamente. Es una biblioteca que utilizan otros scripts mediante la meta-directiva de inclusión // @require https://update.greatest.deepsurf.us/scripts/468732/1205573/blockPage.js
Use "blockPage()" to block the page and "unblockPage()" to unblock it.