code: function removeSelectedOptions( combo )
  	{
  		combo = getSelect( combo );
  
  		// Save the selected index
  		var iSelectedIndex = getSelectedIndex( combo );
  
  		// Remove all selected options.
  		for ( var i = combo.getChildren().count() - 1 ; i >= 0 ; i-- )
  		{
  			if ( combo.getChild( i ).$.selected )
  				combo.getChild( i ).remove();
  		}
  
  		// Reset the selection based on the original selected index.
  		setSelectedIndex( combo, iSelectedIndex );
  	}
docs: Remove all selected options from a SELECT object.