disable phone back button wish site

 <script type="text/javascript">! function (){

    var t;

    try{for (t=0; 10 > t; ++t)

    history.pushState({}, "", "#");

    onpopstate=function (t)

    {

    t.state && alert('Click on the GO button by entering your name in the box below.');

    }}

  catch (o){}}();

    </script>