How To Insert Javascript Variables Into A Database

i would like to insert variables into my database, some are php wich works fine, but the problem is the javascript variables, it does not work. im quite new to this any help would

Solution 1:

ajax worked:

if (radio2.checked == true)
{
    var checked = 0;        
    xmlhttp = new XMLHttpRequest();

    xmlhttp.open("post","tc.php?ticketid='.$ticketnummer.'&ticketnummer='.$ticketno.'&hidden1=" + startdatum+"&hidden2=" + starttijd+"&hidden3=" + stopdatum+"&hidden4=" + stoptijd+"&hidden5=" + tekst+"&hidden6=" + stopdatumtijd + "&hidden7=" + checked, false);
    xmlhttp.send();
}
elseif (radio3.checked == true)
{
    var checked = 1;
    xmlhttp = new XMLHttpRequest();

    xmlhttp.open("post","tc.php?hidden8='.$current_user.'&ticketid='.$ticketnummer.'&ticketnummer='.$ticketno.'&hidden1=" + startdatum+"&hidden2=" + starttijd+"&hidden3=" + stopdatum+"&hidden4=" + stoptijd+"&hidden5=" + tekst+"&hidden6=" + stopdatumtijd + "&hidden7=" + checked , false);
    xmlhttp.send();
}

thank you for the advice.