Source
<HTML>
<BODY>
<SCRIPT Language="JavaScript">
   function DisplayProperties() {
      n = document.Form1.sex.length 
      for ( i=0; i < n; i++ ) {
         if ( document.Form1.sex[i].checked ){
            window.alert( "您選擇了 " + document.Form1.sex[i].value );
            break;
         }
      }
      n = document.Form1.blood.length 
      for ( i=0; i < n; i++ ) {
         if ( document.Form1.blood[i].checked ){
            window.alert( "您選擇了 " + document.Form1.blood[i].value );
            break;
         }
      }
   }
</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>