$("#table_id tbody").on("click","tr",function() {
var td = $(this).find("td");
var data = td.eq(0).text();
});
//The advantage of this is that even if the table is turned, it will not affect the click event
$("#table_id tbody").on("click","tr",function() {
var td = $(this).find("td");
var data = td.eq(0).text();
});
//The advantage of this is that even if the table is turned, it will not affect the click event