Jquery html attr radio input alt content

Jquery html attr radio input alt content

I want to use Jquery Attr.Radio Button click and write to #RadioDesc id's
div...
<input type="radio" desc="sample description" class="AddText">
<script type="text/javascript">
$( document ).ready( function() {
$("radio").click( function() {
$("#RadioDesc").attr("desc");
});
});
</script>
These codes not work...Please help me solutions...