var imageTag = false;
var theSelection = false;

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);

b_help = "Texte gras: [b]texte[/b]";
i_help = "Texte italique: [i]texte[/i]";
u_help = "Texte souligné: [u]texte[/u]";
s_help = "Texte barré: [s]texte[/s]";
z_help = "Puce: [z]texte[/z]";
q_help = "Citation: [quote]texte cité[/quote]";
c_help = "Afficher du code: [code]code[/code]";
l_help = "Liste: [list]texte[/list]";
o_help = "Liste ordonnée: [list=]texte[/list]";
p_help = "Insérer une image: [img]http://image_url/[/img]";
w_help = "Insérer un lien: [url]http://url/[/url] ou [url=http://url/]Nom[/url]";
a_help = "Fermer toutes les balises BBCode ouvertes";
s_help = "Couleur du texte: [color=red]texte[/color]. Astuce: #FF0000 fonctionne aussi";
f_help = "Taille du texte: [size=x-small]texte en petit[/size]";

// Define the bbCode tags
bbcode = new Array();
bbtags = new Array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[z]','[/z]','[s]','[/s]','[list]','[/list]','[list=]','[/list]','[img]','[/img]','[url=]','[/url]');
imageTag = false;


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

}


// 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 bbfontstyle(form, champ, bbopen, bbclose) {
	var txtarea = eval('document.' + form + '.' + champ + '');

	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 bbstyle(form, champ, bbnumber) {
	var txtarea = eval('document.' + form + '.' + champ + '');

	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.post.addbbcode' + butnumber + '.value');
			eval('document.post.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.value += bbtags[15];
			lastValue = arraypop(bbcode) - 1;	// Remove the close image tag from the list
			eval('document.' + form + '.addbbcode14.value ="Img');
			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();
}