<form name="form1" method="post"> <input type="radio" onclick="f()" name=ra1>1 <input type="radio" onclick="f1()" name=ra1>2<br><input type="text" name="text1" style="display:none" value="1"><br> <input type="text" name="text2" style="display:none" value="2"> </form> <script> function f() { document.form1.text2.style.display="none"; document.form1.text1.style.display="block"; } function f1() { document.form1.text1.style.display="none"; document.form1.text2.style.display="block"; } </script>
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