enable/disable textbox

Question

All,

How to enable/disable textbox onclick of this radio button
i.e, if radio button is selected then the textbox should be enabled else disabled

<INPUT TYPE="radio" name="type" id="type1">
<input type="text" name="name" value="<?php echo $name?>" onChange="javascript:enableField();"/>

Answer 1

<input type="radio" name="type" id="type1" onclick="toggleTextbox(this);" />
<input type="text" name="name" value="<?php echo $name?>" id="name1" />

<script type="text/javascript">
function toggleTextbox(rdo) {
    document.getElementById("name1").disabled = !rdo.checked;
}
</script>