php - Session variable in html -

i have index.html contains login form. when user submits proceeds login.php , when user verified, heads index.html. verified username stored in session variable called username. want username shown @ top of index.html. 'hi ' or 'hi guest' if session variable empty. please help.

update: think ajax or jquery can retrieve session variable. plum ' s idea should work isn't. request post full fledged files. thanks.

add php page check-session.php , put following code

<?php   if(!session_id())session_start(); $sessval=isset($_session['guest']) ? $_session['guest'] : null;  echo $sessval; ?> 

and underneath index.html page put javascript code:

$(document).ready(function(){ $.get("check-session.php", function(data, status){      if(data)     $("#guestcontainer").html('hi'+data);     else     $("#guestcontainer").html(null);  });}); 

this jquery load function show guest's name.