How to make an extra cell in html using jquery

How to make an extra cell in html using jquery

i have ajax/json method (web method) which binds html table in following way (let me share piece of code)
 
  1. for (var i = 0; i < data.d.length; i++) {

    $(

    "#tbl").append("<tr><td>" + (data.d[i].id) + "</td><td>" + (data.d[i].name) + "</td><td>" + (data.d[i].age) + "</td></tr>");

      where data.d[i].name is data return by webmethod ..up till here its working fine ..but i want to add new cell column for each row in href format i.e i need to have <a href=erum>erum</a>
      can any one know how to do this..