打開或隱藏所有窗口

//打開或隱藏所有窗口
function showDesktop(event)
{
	var eventObject = window.application.event;
	var menuItem = eventObject ? application.getTextContent(eventObject.menuitem) : isOpenWindow();
	var containers = window.system.containers;
	if (menuItem != MINIMIZE_ALL)
	{
		for ( var applicaionID in applicationButtons )
		{
			containers[applicaionID].show();
		}
	}
	else
	{
		for ( var applicaionID in applicationButtons )
		{
			containers[applicaionID].hide();
		}
	}
}