Can anyone help me in creating a cascading menu of below kind,..
If you are using php to build the menu, you'll need a really good db structure to hold the info, I usually use:
label (caption on navbar)
alt (the 'title' for rollover)
url (the page to open)
target (e.g. _blank)
parent_id (this is 0 as default - top level, but if value not 0, it takes the id of the parent)
rank_item (order in which the item appears)