function toggle( targetId ){
  if ( (document.getElementById) && ( target = document.getElementById( targetId ) ) ){
  		target = document.getElementById( targetId );
  			if (target.style.display == "block"){
  				target.style.display = "none";
  			} else {
				 target.style.display = "block";			 
  			}
  	}
}

<!-- SCRIPT D'IMPLANTATION
function add(text) {
	text = ' ' + text + ' ';
	if (document.form.message.createTextRange && document.form.message.caretPos) {
		var caretPos = document.form.message.caretPos;
		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text + ' ' : text;
		document.form.message.focus();
	} else {
	document.form.message.value  += text;
	document.form.message.focus();
	}
}
//-->

// script de popup
function popup(page) {
fen = window.open (""+ page +"","popup","top=0 left=0, toolbar=0,location=0,directories=0,status=0,scrollbars=1,resizable=0,copyhistory=0,menuBar=0, width=520, height=500");
if (self.focus) fen.focus();
}

// script pr les checkbox
function changeBox(cbox) {
	box = eval(cbox);
	box.checked = !box.checked;
}

// clic btn = 1

var cpt=0;
function clic_btn(){
	if(cpt == 0){
		document.form.submit();
		cpt++;
		}
	else{
		alert('Vous avez déjà cliqué !');
		}
	}

<!--
// BBCODE

// Startup variables
var imageTag = false;
var theSelection = false;

// Check for Browser & Platform for PC & IE specific bits
// More details from: http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html
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);

// helpline
b_help = "Texte gras : [b]texte[/b] (alt+b)";
i_help = "Texte italique : [i]texte[/i] (alt+i)";
u_help = "Texte souligné : [u]texte[/u] (alt+u)";
q_help = "Citation : [quote]texte cité[/quote] (alt+q)";
c_help = "Afficher du code : [code]code[/code] (alt+c)";
l_help = "Liste : [list]texte[/list] (alt+l)";
o_help = "Liste ordonnée : [list=]texte[/list] (alt+o)";
p_help = "Insérer une image : [img]http://url img .gif ou .jpg[/img]";
w_help = "Insérer un lien : [url=http://url/]Nom[/url] (alt+w)";
a_help = "Fermer toutes les balises BBCode ouvertes";
s_help = "Barrer un texte : [s]prout[/s]";
f_help = "Taille du texte : [size=x-small]texte en petit[/size]";
r_help = "Alligner qqch : [align=center]texte au centre[/align]";
k_help = "Image sans lien : [img2]url img[/img2]";
sp_help = "Spoiler de Jv ou autre : [spoiler]texte[/spoiler]";
ca_help = "Pour un txt décallé (intro par exple) : [bloc]texte[/bloc]";
c2_help = "Pour un texte caché : [cache=lien pour afficher]texte à afficher[/cache]";
vd_help = "Pour utiliser le lecteur de Dailymotion";
vf_help = "Pour utiliser le lecteur Flash du Kalif]";

// Define the bbCode tags
bbcode = new Array();
bbtags = new Array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[quote]','[/quote]','[code]','[/code]','[list]','[/list]','[list=]','[/list]','[img]','[/img]','[url=lien à cliquer]','[/url]','[img2]','[/img2]','[spoiler]','[/spoiler]','[s]','[/s]','[bloc]','[/bloc]','[align=]','[/align]','[cache=lien à cliquer]','[/cache]','[videodaily]','[/videodaily]','[flash=largeur,hauteur]','[/flash]');
imageTag = false;

// Shows the help messages in the helpline window
function helpline(help) {
	document.form.helpbox.value = eval(help + "_help");
}


// Replacement for arrayname.length property
function getarraysize(thearray) {
	for (i = 0; i < thearray.length; i++) {
		if ((thearray[i] == "undefined") || (thearray[i] == "") || (thearray[i] == null))
			return i;
		}
	return thearray.length;
}

// Replacement for arrayname.push(value) not implemented in IE until version 5.5
// Appends element to the array
function arraypush(thearray,value) {
	thearray[ getarraysize(thearray) ] = value;
}

// Replacement for arrayname.pop() not implemented in IE until version 5.5
// Removes and returns the last element of an array
function arraypop(thearray) {
	thearraysize = getarraysize(thearray);
	retval = thearray[thearraysize - 1];
	delete thearray[thearraysize - 1];
	return retval;
}


function checkForm() {

	formErrors = false;

	if (document.form.message.value.length < 2) {
		formErrors = "Vous devez entrer un message avant de poster.";
	}

	if (formErrors) {
		alert(formErrors);
		return false;
	} else {
		bbstyle(-1);
		//formObj.preview.disabled = true;
		//formObj.submit.disabled = true;
		return true;
	}
}


function bbfontstyle(bbopen, bbclose) {
	var txtarea = document.form.message;

	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))
	{
		mozWrapA(txtarea, bbopen, bbclose);
		return;
	}
	else
	{
		txtarea.value += bbopen + bbclose;
		txtarea.focus();
	}
	storeCaret(txtarea);
}


function bbstyle(bbnumber) {
	var txtarea = document.form.message;

	txtarea.focus();
	donotinsert = false;
	theSelection = false;
	bblast = 0;

	if (bbnumber == -1) { // Close all open tags & default button names
		while (bbcode[0]) {
			butnumber = arraypop(bbcode) - 1;
			txtarea.value += bbtags[butnumber + 1];
			buttext = eval('document.form.addbbcode' + butnumber + '.value');
			eval('document.form.addbbcode' + butnumber + '.value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
		}
		imageTag = false; // All tags are closed including image tags :D
		txtarea.focus();
		return;
	}

	if ((clientVer >= 4) && is_ie && is_win)
	{
		theSelection = document.selection.createRange().text; // Get text selection
		if (theSelection) {
			// Add tags around selection
			document.selection.createRange().text = bbtags[bbnumber] + theSelection + bbtags[bbnumber+1];
			txtarea.focus();
			theSelection = '';
			return;
		}
	}
	else if (txtarea.selectionEnd && (txtarea.selectionEnd - txtarea.selectionStart > 0))
	{
		mozWrap(txtarea, bbtags[bbnumber], bbtags[bbnumber+1]);
		return;
	}

	// Find last occurance of an open tag the same as the one just clicked
	for (i = 0; i < bbcode.length; i++) {
		if (bbcode[i] == bbnumber+1) {
			bblast = i;
			donotinsert = true;
		}
	}

	if (donotinsert) {		// Close all open tags up to the one just clicked & default button names
		while (bbcode[bblast]) {
				butnumber = arraypop(bbcode) - 1;
				txtarea.value += bbtags[butnumber + 1];
				buttext = eval('document.form.addbbcode' + butnumber + '.value');
				eval('document.form.addbbcode' + butnumber + '.value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
				imageTag = false;
			}
			txtarea.focus();
			return;
	} else { // Open tags

		if (imageTag && (bbnumber != 14)) {		// Close image tag before adding another
			txtarea.valAue += bbtags[15];
			lastValue = arraypop(bbcode) - 1;	// Remove the close image tag from the list
			document.form.addbbcode14.value = "Img";	// Return button back to normal state
			imageTag = false;
		}

		// Open tag
		txtarea.value += bbtags[bbnumber];
		if ((bbnumber == 14) && (imageTag == false)) imageTag = 1; // Check to stop additional tags after an unclosed image tag
		arraypush(bbcode,bbnumber+1);
		eval('document.form.addbbcode'+bbnumber+'.value += "*"');
		txtarea.focus();
		return;
	}
	storeCaret(txtarea);
}

// From http://www.massless.org/mozedit/
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;
}

// Insert at Claret position. Code from
// http://www.faqts.com/knowledge_base/view.phtml/aid/1052/fid/130
function storeCaret(textEl) {
	if (textEl.createTextRange) textEl.caretPos = document.selection.createRange().duplicate();
}

//-->



function setActiveStyleSheet(title) {
 var i, a, main;
 for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
   if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
     a.disabled = true;
     if(a.getAttribute("title") == title) a.disabled = false;
   }
 }
}

function getActiveStyleSheet() {
 var i, a;
 for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
   if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
 }
 return null;
}

function getPreferredStyleSheet() {
 var i, a;
 for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
   if(a.getAttribute("rel").indexOf("style") != -1
      && a.getAttribute("rel").indexOf("alt") == -1
      && a.getAttribute("title")
      ) return a.getAttribute("title");
 }
 return null;
}

function createCookie(name,value,days) {
 if (days) {
   var date = new Date();
   date.setTime(date.getTime()+(days*24*60*60*1000));
   var expires = "; expires="+date.toGMTString();
 }
 else expires = "";
 document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
 var nameEQ = name + "=";
 var ca = document.cookie.split(';');
 for(var i=0;i < ca.length;i++) {
   var c = ca[i];
   while (c.charAt(0)==' ') c = c.substring(1,c.length);
   if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
 }
 return null;
}

window.onload = function(e) {
 var cookie = readCookie("style");
 var title = cookie ? cookie : getPreferredStyleSheet();
 setActiveStyleSheet(title);
 document.getElementById('button_skin_ok').style.display = 'none';
}

window.onunload = function(e) {
 var title = getActiveStyleSheet();
 createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);