jquery determines how radio button radio is selected _jquery

This example describes the method that jquery determines whether radio button radio is selected. Share to everyone for your reference. Specifically as follows:

The HTML code is as follows:

<input type= "Radio" id= "D1" name= "RA" value= "a" checked= "checked"/> <input type=
"Radio" id= "D2" Name= "RA" Value= "B"/>
<input type= "Radio" id= "D3" Name= "Ra" value= "C"/>

1. Get ID when loading page

$ ("input[type= ' Radio ']"). each (function () {
  var id= $ (this). attr ("id");
  if ($ ("#" +id). attr ("checked") = = "Checked") {
   var fs=$ ("#" +id). Val ();
  }
});
var S1 = $ (". Aa:checked"). Val (); . AA is class
var s2 = $ ("Input[name= ' ra ']:checked"). Val ();

2. Get ID when clicking the button

$ (function () {
  $ (' input[type= ' Radio ']). Click (function () {
    var id= $ (this). attr ("id");
    alert (ID);
  });

I hope this article will help you with your jquery programming.