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);

bbcode = new Array();
bbtags = new Array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[quote]','[/quote]','[code]','[/code]','[list]','[/list]','[list=]','[/list]','[img]','[/img]','[url]','[/url]');
imageTag = false;

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 < 2) {
        formErrors = l_empty_message;
    }

    if (formErrors) {
        alert(formErrors);
        return false;
    } else {
        bbstyle(-1);
        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 emoticon_wospaces(text) {
    var txtarea = document.forumPostData.message;
    if (txtarea.createTextRange && txtarea.caretPos) {
        var caretPos = txtarea.caretPos;
        if(txtarea.value=='Текст сообщения') txtarea.value='';
        caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
        txtarea.focus();
    } else {
        if(txtarea.value=='Текст сообщения') txtarea.value='';
        txtarea.value  += text;
        txtarea.focus();
    }
}

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);
}

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;
}

function storeCaret(textEl) {
    if (textEl.createTextRange) textEl.caretPos = document.selection.createRange().duplicate();
}

var selection = false; // Selection data

function catchSelection()
{
    if (window.getSelection)
    {
        selection = window.getSelection().toString();
    }
    else if (document.getSelection)
    {
        selection = document.getSelection();
    }
    else if (document.selection)
    {
        selection = document.selection.createRange().text;
    }
}

function putName(name)
{ 
    emoticon_wospaces('[b]'+name+'[/b]\n'); 
    document.post.message.focus(); 
    return; 
}

function quoteSelection(name)
{
    if (selection)
    { 
        emoticon_wospaces('[quote="'+name+'"]' + selection + '[/quote]\n'); 
        selection = '';
        document.post.message.focus(); 
        return; 
    }
    else
    { 
        alert(l_no_text_selected);
        return; 
    } 
}