It has been over a year since i was here last, and to my surprise my post was only on the second page. Thanks to everyone for replying, and supporting my idea of locking/unlocking items!
Here is the new picture i have edited.
As you can see, along with the padlock i origionally used to show an item was locked, when an item is now withdrawn to a count of zero it is placed into a placeholder scroll. In just the normal bank view, the scroll is closed, to save room, but just click on it to see what is in the scroll. Just a little fun thing i thought of.
To lock items, just click down the 'Lock' button on the bottom of the bank, and go along and lock all the item you want to. The same goes for unlock, just click it down and unlock all the items you want unlocked. Unlocking a scrolled item will remove it.
For old time sakes, here is the origional bank page idea, which i had before the current one by Jagex.