Hi
You must use form JavaScript.
For hide a element by JavaScript you can use from bellow code:
<script type="text/javascript">
function YourFunctionName() {
document.getElementById('YourTextBoxID').style.visibility = 'hidden';
return true;
}
</script>
For showa element by JavaScript you can use from bellow code:
<script type="text/javascript">
function YourFunctionName() {
document.getElementById('YourTextBoxID').style.visibility = 'visible';
return true;
}
</script>
For call this function you can use from bellow code:
Radio1<input type="radio" id="TestRadio1" name="RadioName1" value="RadioButton1" önclick="return YourFunctionName();" />
I hope it's helpful for you.