my radio button not working properly?

<input type="radio" name="kvr"  checked="checked" onclick="hideall1();showit1('x1')"  <?php if (isset($_POST['kvr']) && $_POST['kvr']=="yes") echo "checked";?> value="yes"  >Same &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;

<input type="radio" name="kvr" onclick="hideall();showit('x1')"  <?php if (isset($_POST['kvr']) && $_POST['kvr']=="no") echo "checked";?> value="no" >Other

-----------------------

remove checked="checked" from first line