Fix bugs on Admin

1.Fix the sort of head_menu.html
2.FIND head_menu.html maybe need a scrollbar
3.Admin/Orderman/userInfo change into ajax method
Change cart.html css when edit the order
Fix edit_menu method
Fix cart.html
Merge ChongYu's work on Home 11.16

1.Merge ChongYu’s work
2.Change directory name js into scripts
3.Fix setInvalid in newOrders
Fix setInvalid on Orderitem
Merge ChongYu's work on Admin 11.16
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