Can't get radio buttons stay checked?

[Portmoon]

Hi,

I am constructing a calculator and want to use radio buttons to select a number of arithmetic operations. In this case 'Add', 'Subtract', 'Multiply' and 'Divide'. Although the desired symbol is displayed and it calculates the sum correctly the corresponding radio button will not remain selected i.e. checked

Can you help?

Thanks!!

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

function InputData(checked){

document.calculator.display.value=document.calculator.display.value+checked;

}//InputData


<input type="radio" VALUE="Add" onClick="InputData('+')">+ </td>

<input type="radio" VALUE="Subtract" onClick="InputData ('-')">- </td>

<input type="radio" VALUE="Multiply" onClick="InputData('*')">* </td>

<input type="radio" VALUE="Divide" onClick="InputData('/')">/</td>

[Jona]

"All elements must have a name"


<script>
function InputData(type){
document.calculator.display.value=document.calculator.display.value+type;
}
</script>
<form name="calculator">
<input type=text name="display">
<input type="radio" name="zippy" VALUE="Add" onClick="InputData('+')">+ </td>

<input type="radio" name="zippy" VALUE="Subtract" onClick="InputData ('-')">- </td>

<input type="radio" name="zippy" VALUE="Multiply" onClick="InputData('*')">* </td>

<input type="radio" name="zippy" VALUE="Divide" onClick="InputData('/')">/</td>

[Portmoon]

Thanks a lot Jona, giving each element a name has worked!!

Thanks too Dave for your input, I shall make a note of those four instances in relation to the radio buttons.

Cheers to you both,

Portmoon