Untitled

How to deal with page refresh when using HTML5 History?
document.addEventListener('DOMContentLoaded', init, false);

function hasBrowserHistory(){return !!(window.history && history.pushState);}
function updateHistory(url, replaceHistory) {
//Create a page path
var path  = "?page=" + url.split(".")[0];
var object = {
        data: url
    };

if(replaceHistory){
    //alert('as');
    /*
    If this is the first page we are loading
    replace the current history item.
    */
    history.replaceState(object, null, path);
}else{
    //alert('qw');
    /*
    If we got here by clicking one of the links
    add a new item to the browser history
    */
    history.pushState(object, null, path);
}
}

function loadPage(whichPage, replaceHistory) {
$('#contentCol').load(whichPage);
updateHistory(whichPage, replaceHistory);
}

function historyPopStateHandler(e) {
//var state = history.state;
if (e.state == null) {
    alert(e.state.url);
}
if(e.state != null) {
    loadPage(e.state.data, true);
}
}

function getUrlVars() {
var vars = [], hash;
var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
for(var i = 0; i < hashes.length; i++)
{
    hash = hashes[i].split('=');
    vars.push(hash[0]);
    vars[hash[0]] = hash[1];
}
return vars;
}

function init() {
//Check if the history API is available
if(!hasBrowserHistory()){
    alert('Sorry dude, your browser does not support the history API');
    return;
}

//Check if we have any url params (e.g bookmark or reload)
var params = getUrlVars();

if(params['page'] != undefined && params['page'] != null){
    //Load the holder page with the correct content
    loadPage(params['page'] + ".jsp", true);
}else{
    //Load the default page
    loadPage('loadcourses.jsp', true);
}


//Setup listeners for the links
jQuery('nav > a').click(function(e){
    e.preventDefault();
    loadPage(jQuery(e.target).attr('href'), false);
});

//Setup listeners for the history events
window.addEventListener('popstate', historyPopStateHandler);
}