// 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 messages
col_help = "Font color: [color=red]text[/color] or [color=#rrggbb]text[/color]";
siz_help = "Font size: [size=x-small]small text[/size]";

b_help = "Bold text: [b]text[/b]";
i_help = "Italic text: [i]text[/i]";
u_help = "Underline text: [u]text[/u]";
str_help = "Strike through text: [strike]text[/strike]";

lft_help = "Left Justify text: [left]text[/left]";
cen_help = "Center text: [center]text[/center]";
rgt_help = "Right Justify text: [right]text[/right]";

li_help = "List: [list]text[/list]";
ol_help = "Ordered list: [list=]text[/list]";
qut_help = "Quote text: [quote]who@http://url[/quote]";

img_help = "Insert image: [img]http://image_url[/img]";
url_help = "Insert URL: [url]http://url[/url] or [url=http://url]URL text[/url]";
eml_help = "Insert eMail: [email]who@where.com[/email]";

all_help = "Close all open bbCode tags";
hlp_help = "Help Me!";

// Define the bbCode tags
bbcode = new Array();
bbtags = new Array('[b]','[/b]',
				   '[i]','[/i]',
				   '[u]','[/u]',
				   '[strike]','[/strike]',
				   '[left]','[/left]',
				   '[center]','[/center]',
				   '[right]','[/right]',
				   '[list]','[/list]',
				   '[list=]','[/list]',
				   '[quote]','[/quote]',
				   '[img]','[/img]',
				   '[url]','[/url]',
				   '[email]','[/email]'
				   );
	
imageTag = false;

// Shows the help messages in the helpline window
function bbhelp(help)
{
	document.fmPost.fmHelpbox.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()
{
}

function emoticon(text)
{
	var txtarea = document.fmPost.body;
	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 bbfontstyle(bbopen, bbclose)
{
	var txtarea = document.fmPost.body;

	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(bbnumber)
{
	var txtarea = document.fmPost.body;

	alert(bbnumber);

	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];
		}
		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];
			imageTag = false;
		}
		txtarea.focus();
		return;
	}
	else
	{ 	// Open tags
		if (imageTag && (bbnumber != 20)) {			// Close image tag before adding another
			txtarea.value += bbtags[21];
			lastValue = arraypop(bbcode) - 1;		// Remove the close image tag from the list
			imageTag = false;
		}
		// Open tag
		txtarea.value += bbtags[bbnumber];
		if ((bbnumber == 20) && (imageTag == false))
			imageTag = 1; 		// Check to stop additional tags after an unclosed image tag
		arraypush(bbcode, bbnumber+1);
		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();
}