function uncheck(el) {

if (document.getElementById) {
var radio = document.getElementById(el.id);
var temp = document.getElementById(el.name+'_temp');

} else if (document.all) {
alert("test1");
var radio = document.all[el.id];
var temp = document.all[el.name+'_temp'];
} else {
if ((navigator.appname.indexOf("Netscape") != -1) && parseInt(navigator.appversion == 4)) {
var radio = document.layers[el.id];
var temp = document.layers[el.name+'_temp'];
}
}
if(radio.value == temp.value) {
radio.checked = false;
temp.value = '';
} else {
temp.value = radio.value;
}
}

function valider()
{
var chan_discu = "andromede";
var chan_age = "null";
var chan_jeux = "null";
if (document.forms.chat.chan_discu["0"].checked) {
                chan_discu = "andromede" ;
}
if (document.forms.chat.chan_discu["1"].checked) {
                chan_discu = "rencontre" ;
}
if (document.forms.chat.chan_discu["2"].checked) {
              chan_discu = "gaylesb" ;
}
if (document.forms.chat.chan_discu["3"].checked) {
              chan_discu = "belgique" ;
}
if (document.forms.chat.chan_discu["4"].checked) {
              chan_discu = "suisse" ;
}
if (document.forms.chat.chan_discu["5"].checked) {
              chan_discu = "quebec" ;
}
if (document.forms.chat.chan_age["0"].checked) {
                chan_age = "dizaine" ;
}
if (document.forms.chat.chan_age["1"].checked) {
                chan_age = "vingtaine" ;
}
if (document.forms.chat.chan_age["2"].checked) {
               chan_age = "trentaine" ;
}
if (document.forms.chat.chan_age["3"].checked) {
                chan_age = "quarantaine" ;
}
if (document.forms.chat.chan_age["4"].checked) {
                chan_age = "cinquantaine" ;
}
if (document.forms.chat.chan_age["5"].checked) {
               chan_age = "soixantaine" ;
}
if (document.forms.chat.chan_jeux["0"].checked) {
                chan_jeux = "tetrinet" ;
}
if (document.forms.chat.chan_jeux["1"].checked) {
                chan_jeux = "quizz-1" ;
}
if (document.forms.chat.chan_jeux["2"].checked) {
                chan_jeux = "quizz-2" ;
}
if (document.forms.chat.chan_jeux["3"].checked) {
              chan_jeux = "uno" ;
}
if (document.forms.chat.chan_jeux["4"].checked) {
                chan_jeux = "motus-1" ;
}
if (document.forms.chat.chan_jeux["5"].checked) {
              chan_jeux = "motus-2" ;
}
var nick = document.forms.chat.nick.value;
var sexe = document.forms.chat.sexe.value;
var age = document.forms.chat.age.value;
var ville = document.forms.chat.ville.value;
var phrase = document.forms.chat.phrase.value;
var couleur = document.forms.chat.couleur.value;
var pv = document.forms.chat.pv.value;
var port = document.forms.chat.port.value;

open_chat("http://www.andromede.net/chat/index.php?nickname="+nick+"&sexe="+sexe+"&age="+age+"&ville="+ville+"&chan_discu="+chan_discu+"&chan_age="+chan_age+"&chan_jeux="+chan_jeux+"&couleur="+couleur+"&pv="+pv+"&phrase="+phrase+"&port="+port+"");

}