Profile: tianyingchun

hi, i bought your theme Nop Pavilion Responsive Theme with multi liences.
but now i need to add new sort options  as below
1. Most Viewed 
2. Best Sellers
3. Express to US --My customised filed in table 'product' named  'shipToUs'

the demo of http://demos.nop-templates.com/?demo=smartproductcollections

the sort option the datasource corresponding to  "Smart Product Collections" configuration 

could you guide me how to change some code to archive this

while using ajax cart plugin, we have strong requirement to force user to login or register before add items to cart. how to do this with using ajax cart plugin

i think the product review rating sort, hot sale counts sorting is very usefully.