Source
<HTML>
<BODY>
<SCRIPT Language="JavaScript">
   function DisplayProperties() {
      n = document.Form1.sex.length 
      for ( i=0; i < n; i++ ) {
         c1 = document.Form1.sex[i].value;
         c2 = document.Form1.sex[i].checked; 
         c3 = document.Form1.sex[i].defaultChecked;          
         window.alert("sex[" + i +"] value=" + c1 + ",checked=" + c2 + ",defaultChecked=" + c3);
      }
      n = document.Form1.blood.length 
      for ( i=0; i < n; i++ ) {
         c1 = document.Form1.blood[i].value;
         c2 = document.Form1.blood[i].checked; 
         c3 = document.Form1.blood[i].defaultChecked;          
         window.alert("blood[" + i +"] value=" + c1 + ",checked=" + c2 + ",defaultChecked=" + c3);
      }
   }
</SCRIPT>
   
<FORM Name=Form1>

性別:
<INPUT Type=Radio Name=sex Value="male" Checked=On>男　
<INPUT Type=Radio Name=sex Value="female">女<P>

血型:
<INPUT Type=Radio Name=blood Value="A" Checked=On >A　
<INPUT Type=Radio Name=blood Value="B">B　
<INPUT Type=Radio Name=blood Value="AB">AB　
<INPUT Type=Radio Name=blood Value="O">O<P>

<INPUT Type=Button Value="顯示屬性" OnClick="DisplayProperties();">

</FORM>
</BODY>
</HTML>