I am using Tiger Menu( free).
My submenu and Submens of submenu are appearing outside the screen.
Is there any way so that depending on the screen width submenu can be displayed either on left side or right side of main menu.
The sub-menus in free version will appear according to your settings in menu_tpl.js even if it means going outside of the visible area.
With PRO and GOLD versions you can specify the positioning for individual sub-menus. Additionally in GOLD version there is a mode where menu will try to automatically reposition the sub-menu if it is positioned outside of the visible area.