Text box appear on radio button check

Answer 1

If the radio buttons map to the next rows cell you can try this:

<script type="text/javascript">
    $(function(){
        $("table input:radio").click(function(){
            var $radio = $(this);
            var index = $radio.closest("td").index();
            $radio.closest("tr").next().find("input:text").eq(index)
                .toggle($radio.is(":checked"));
        });
    });
</script>

or if there is only 1 textbox in the next row you can try:

<script type="text/javascript">
    $(function(){
        $("table input:radio").click(function(){
            var $radio = $(this);
            $radio.closest("tr").next().find("input:text")
                .toggle($radio.is(":checked"));
        });
    });
</script>

Your markup looks invalid or you just copied/pasted it wrong