Inserts items at the beginning of the list . It may be useful if you want to move the items from one list to another. If end is negative, or greater than the number of children of list , it's assumed to be exactly the number of elements. If start is greater than or equal to end , nothing is done. Nothing happens if item is out of bounds.
Nothing happens if item is out of bounds.
Zero or one element may be selected. Any number of elements may be selected. Clicks toggle the state of an item. Any number of elements may be selected. Selects all children of list .