var imageTag = false;
var theSelection = false;
var clientPC = navigator.userAgent.toLowerCase();
var clientVer = parseInt(navigator.appVersion);
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 = "Tučné: [b] text [/b]  Klávesová skratka: (alt+b)";
i_help = "Kurzíva: [i] text [/i]  Klávesová skratka: (alt+i)";
n_help = "Nadpis: [nadpis] text [/nadpis]  Klávesová skratka: (alt+n)";
m_help = "Malé písmo: [minitext] text [/minitext]  Klávesová skratka: (alt+m)";
a_help = "Zavrie všetky otvorené značky";
s_help = "Farba písma: [farba=Červená]text[/farba]  Typ: Farbu aplikujte na označený text";

bbcode = new Array();
bbtags = new Array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[nadpis]','[/nadpis]','[minitext]','[/minitext]','[odstavec]','[/odstavec]','[list=]','[/list]','[br]','','[url]','[/url]');
imageTag = false;

function helpline(help) {
	document.post.helpbox.value = eval(help + "_help");
}

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

function arraypush(thearray,value) {
	thearray[ getarraysize(thearray) ] = value;
}

function arraypop(thearray) {
	thearraysize = getarraysize(thearray);
	retval = thearray[thearraysize - 1];
	delete thearray[thearraysize - 1];
	return retval;
}


function checkForm() {

	formErrors = false;

	if (document.post.message.value.length < 0) {
		formErrors = "Musíte zadať text príspevku";
	}

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

function emoticon(text) {
	var txtarea = document.post.message;
	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.post.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))
	{
		mozWrap(txtarea, bbopen, bbclose);
		return;
	}
	else
	{
		txtarea.value += bbopen + bbclose;
		txtarea.focus();
	}
	storeCaret(txtarea);
}


function bbstyle(bbnumber) {
	var txtarea = document.post.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.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.post.addbbcode' + butnumber + '.value');
				eval('document.post.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
			document.post.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.post.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();
}
//select one list
// pridaj do selectu novy option
function addItemToSelect(select_field, value, description)
{
	var i, j, len;

	for (i=0; i<select_field.options.length; i++)
	{
		if (select_field.options[i].value == value)
		{
			break;
		}
		else
		{
			if (parseInt(select_field.options[i].value) > parseInt(value))
			{
				len = select_field.options.length;
				for (j=len-1; j>=i; j--)
				{
					select_field.options[j+1] = new Option(select_field.options[j].text, select_field.options[j].value);
					//select_field.options[j+1] = select_field.options[j];
				}
				select_field.options[i] = new Option(description, value);
				break;
			}

		}
	}

	if (i == select_field.options.length)
	{
		select_field.options[i] = new Option(description, value);
	}
}

// odober
function removeItemFromSelect(select_field, index)
{
	select_field.options[index] = null;
}


// prepinac medzi selectmi
function moveItemsFromSelectToSelect(select_field_from, select_field_to)
{
	var i;

	unselectAllItems(select_field_to);

for (i=select_field_from.options.length-1; i>=0; i--)
	{
		if (select_field_from.options[i].selected)
		{
			addItemToSelect(select_field_to,
							select_field_from.options[i].value,
							select_field_from.options[i].text);
		}
	}
for (i=select_field_from.options.length-1; i>=0; i--)
	{
		if (select_field_from.options[i].selected)
		{
			removeItemFromSelect(select_field_from, i);
		}
	}
}

// Oznac vsetky pridane
function selectAllItems(select_field)
{
	for (i=0; i<select_field.options.length; i++)
	{
		select_field.options[i].selected = true;

	select_field.options[i].value = codeSelected(select_field);
	}



    }
//pomocna funkcia k prepinacu
function unselectAllItems(select_field)
{
	for (i=0; i<select_field.options.length; i++)
	{
		select_field.options[i].selected = false;
	}
}

//dekoduj pole na retazec
function codeSelected(select_field)
{
  codedString = '';
  for (i=0; i<select_field.options.length; i++)
  {
    codedString = codedString + ',' + select_field.options[i].value;
  }
  return codedString.substring(1);
}