Use of Superscript in Javascript

There are 2 ways of adding Superscript in any string in Javascript.
For ex:-

<script type="text/javascript">
        function sup_script() 
        {
            var str = "Javascript";
            str = str + "<sup>TM</sup>";
            document.write(str);

            document.write("<br/>");

            var str1 = "TM";
            str1 = "Javascript" + str1.sup();
            document.write(str1);
        } 
</script>

With the help of ^text and text.sup() function we can add superscript in any string.