Drop it!

Now that we have dealt with the activation and moving of the cursor, the next step is to handle the "drop" effect at the same time as the user releases the mouse button.

We just need to reinitialise the selectObj variable to indicate that no layer is selected anymore:

115: function release(evt) {
116: if (selectedObj) {
117:   setZIndex(selectedObj, 0)
118:   selectedObj = null
119:  }
120: }

By customising the code, you can create vertical and horizontal scrollbars of any size. Nothing prevents you from also designing bars and cursors that are more attractive than ours. It is entirely up to you!