在javascript中检查单选框

Question

I was just wondering is it possible to have a radiobox checkgroup just 1 on load? Only using JavaScript not using check=checked in html? I only know that. Any help would be appreciated. Cheers

EG

<input type="radio" name="RadioGroup1" value="Phone" id="RadioGroup1_0"    />Phone</label>

<input type="radio" name="RadioGroup1" value="Email" id="RadioGroup1_1" />Email</label>

<input type="radio" name="RadioGroup1" value="Mail" id="RadioGroup1_2" />Mail</label>

Answer 1

Try:

document.querySelector("#RadioGroup1_0").click();

Example: http://jsfiddle.net/uk6cD/

May be it is relevant for you to wrap it in the window' load event handler:

window.onload = function(){
  document.querySelector("#RadioGroup1_0").click();
}

Answer 2

This may help,

$( document ).ready(function() {
      $("#RadioGroup1_0").attr('checked','checked');
});