Probleme BBcode par Darkmores - page 1

Bonjour, lorsque je clique sur mon boutton gras, le code [b][/b] ne s'affiche pas dans le textarea.
Je ne comprend pas le probleme.
Voici le code dem on bbcode.js :

// Fonctions pour le BBcode
var clientPC = navigator.userAgent.toLowerCase(); // Get client info
var clientVer = parseInt(navigator.appVersion); // Get browser version
var is_ie = ((clientPC.indexOf("msie") != -1) && (clientPC.indexOf("opera") == -1));
var is_nav = ((clientPC.indexOf('mozilla')!=-1) && (clientPC.indexOf('spoofer')==-1)
&& (clientPC.indexOf('compatible') == -1) && (clientPC.indexOf('opera')==-1)
&& (clientPC.indexOf('webtv')==-1) && (clientPC.indexOf('hotjava')==-1));
var is_moz = 0;
var is_win = ((clientPC.indexOf("win")!=-1) || (clientPC.indexOf("16bit") != -1));
var is_mac = (clientPC.indexOf("mac")!=-1);
var timer=0;
var ptag=String.fromCharCode(5,6,7);
function visualisation() {
t=document.formu.texte.value
t=code_to_html(t)
if (document.getElementById) document.getElementById("previsualisation").innerHTML=t
if (document.formu.auto.checked) timer=setTimeout(visualisation,1000)
}
function automatique() {
if (document.formu.auto.checked) visualisation()
}
function code_to_html(t) {
t=nl2khol(t)
t=remplace_tag(/:sourire:/g, '<img src="images/smile/sourire.gif">',t)
t=remplace_tag(/:triste:/g, '<img src="images/smile/triste.gif">',t)
t=remplace_tag(/:colere:/g, '<img src="images/smile/colere.gif">',t)
t=remplace_tag(/:rigole:/g, '<img src="images/smile/rigole.gif">',t)
t=remplace_tag(/:decu:/g, '<img src="images/smile/decu.gif">',t)
t=remplace_tag(/:langue:/g, '<img src="images/smile/langue.gif">',t)
t=remplace_tag(/:surpris:/g, '<img src="images/smile/surpris.gif">',t)
t=remplace_tag(/:cleinoeil:/g, '<img src="images/smile/cleinoeil.gif">',t)
t=remblaie(t)
// balise Gras
t=deblaie(/(\[\/b\])/g,t)
t=remplace_tag(/\[b\](.+)\[\/b\]/g,'<b>$1</b>',t)
t=remblaie(t)
// balise Italique
t=deblaie(/(\[\/i\])/g,t)
t=remplace_tag(/\[i\](.+)\[\/i\]/g,'<i>$1</i>',t)
t=remblaie(t)
// balise souligné
t=deblaie(/(\[\/u\])/g,t)
t=remplace_tag(/\[u\](.+)\[\/u\]/g,'<u>$1</u>',t)
t=remblaie(t)
// balise quote
t=deblaie(/(\[\/quote\])/g,t)
t=remplace_tag(/\[quote\](.+)\[\/quote\]/g,'<p class="quote">$1</p>',t)
t=remblaie(t)
// balise Img
t=deblaie(/(\[\/img\])/g,t)
t=remplace_tag(/\[img\](.+)\[\/img\]/g,'<img src="$1"/>',t)
t=remblaie(t)
// balise URL
t=remplace_tag(/\[url=([^\s<>]+)\](.+)\[\/url\]/g,'<a href="$1" target="_blank">$2</a>',t)
// balise Color
t=deblaie(/(\[\/color\])/g,t)
t=remplace_tag(/\[color=(.+?)\](.+?)\[\/color\]/, '<font color=$1>$2</font>',t)
t=remblaie(t)
// balise size
t=deblaie(/(\[\/size\])/g,t)
t=remplace_tag(/\[size=([+-]?[0-9])\](.+)\[\/size\]/g,'<font size="$1">$2</font>',t)
t=remblaie(t)
t=unkhol(t)
t=nl2br(t)
return t
}function deblaie(reg,t) {
texte=new String(t);
return texte.replace(reg,'$1\n');
}
function remblaie(t) {
texte=new String(t);
return texte.replace(/\n/g,'');
}
function remplace_tag(reg,rep,t) {
texte=new String(t);
return texte.replace(reg,rep);
}
function nl2br(t) {
texte=new String(t);
return texte.replace(/\n/g,'<br/>');
}
function nl2khol(t) {
texte=new String(t);
return texte.replace(/\n/g,ptag);
}
function unkhol(t) {
texte=new String(t);
return texte.replace(new RegExp(ptag,'g'),'\n');
}
function countInstances(open,closed)
{
var opening = document.hop.contenu.value.split(open);
var closing = document.hop.contenu.value.split(closed);
return opening.length + closing.length - 2;
}
function TAinsert(text1,text2,contenu)
{
var ta = document.getElementById(contenu);
if (document.selection) {
var str = document.selection.createRange().text;
ta.focus();
var sel = document.selection.createRange();
if (text2!="")
{
sel.text = text1 + sel.text + text2;
}
else
{
sel.text = sel.text + text1;
}
}
else if (ta.selectionStart | ta.selectionStart == 0)
{
if (ta.selectionEnd > ta.value.length) { ta.selectionEnd = ta.value.length; }
var firstPos = ta.selectionStart;
var secondPos = ta.selectionEnd+text1.length;
ta.value=ta.value.slice(0,firstPos)+text1+ta.value.slice(firstPos);
ta.value=ta.value.slice(0,secondPos)+text2+ta.value.slice(secondPos);
ta.selectionStart = firstPos+text1.length;
ta.selectionEnd = secondPos;
ta.focus();
}
else
{ // Opera
var sel = document.hop.contenu;
var instances = countInstances(text1,text2);
if (instances%2 != 0 && text2 != ""){ sel.value = sel.value + text2; }
else{ sel.value = sel.value + text1; }
}
}
function bbfontstyle(bbopen, bbclose) {
var txtarea = document.formu.texte;
if ((clientVer >= 4) && is_ie && is_win) {
theSelection = document.selection.createRange().text;
if (!theSelection) {
txtarea.value += bbopen + bbclose;
txtarea.focus();
return;
}
document.selection.createRange().text = bbopen + theSelection + bbclose;
txtarea.focus();
return;
}
else if (txtarea.selectionEnd && (txtarea.selectionEnd - txtarea.selectionStart > 0))
{
mozWrap(txtarea, bbopen, bbclose);
return;
}
else
{
txtarea.value += bbopen + bbclose;
txtarea.focus();
}
storeCaret(txtarea);
}

function emoticon(text) {
var txtarea = document.formu.text;
text = ' ' + text + ' ';
if (txtarea.createTextRange && txtarea.caretPos) {
var caretPos = txtarea.caretPos;
caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
txtarea.focus();
} else {
txtarea.value += text;
txtarea.focus();
}
}

function mozWrap(txtarea, open, close)
{
var selLength = txtarea.textLength;
var selStart = txtarea.selectionStart;
var selEnd = txtarea.selectionEnd;
if (selEnd == 1 || selEnd == 2)
selEnd = selLength;

var s1 = (txtarea.value).substring(0,selStart);
var s2 = (txtarea.value).substring(selStart, selEnd)
var s3 = (txtarea.value).substring(selEnd, selLength);
txtarea.value = s1 + open + s2 + close + s3;
return;
}

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