use radio button replace the checkbox?

Hi, I want to use radio button relpace the checkbox but can’t work. How to do it?

<form action=””>
<div>
<label><input type=”checkbox” onclick=”if (this.checked) {this.form.description.onfocus = function () {}; this.form.description.focus()} else {this.form.description.value = ”; this.form.description.onfocus = function () {this.blur()}}”>Other</label>
<label>Description<textarea name=”description” onfocus=”this.blur()”></textarea></label>
</div>
</form>

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