如何从javascript（或JQuery）点击查询数据库？

I have a summary view of a database table. When clicking on a row in the table, I'd like to have a popup showing the full data plus some controls for manipulating that item. I've attached a click handler to the item, which then grabs the primary key from one of the table cells in the row. How can I now pass this primary key to ASP.NET and run server code to query my database and update my UI?I have a summary view of a database table. When