javascript selection collapseToEnd( ), collapseToStart( )

Collapses the current selection to a location at the start (collapseToStart( )) or end (collapseToEnd( )) of the selection object. Any previously highlighted selection returns to normal display. If the selection consists of multiple ranges, the start or end boundary used for these collapse methods are at the outermost edges of the combined selection. After the collapse, the selection contains only one range.