jquery to determine if radio button radio is selected

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:

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

1. Get ID when loading page

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$ ("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

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

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