// 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_win   = ((clientPC.indexOf("win")!=-1) || (clientPC.indexOf("16bit") != -1));
var is_mac    = (clientPC.indexOf("mac")!=-1);


// Helpline messages
b_help = "Vet: [b]tekst[/b]  (alt+b)";
i_help = "Cursief: [i]tekst[/i]  (alt+i)";
u_help = "Onderstrepen: [u]tekst[/u]  (alt+u)";
q_help = "Quoten: [quote]tekst[/quote]  (alt+q)";
c_help = "";
l_help = "";
o_help = "";
p_help = "Afbeelding: [img]http://afbeelding_link[/img]  (alt+p)";
w_help = "Link: [url]http://url[/url] of [url=http://url]link text[/url]  (alt+w)";
a_help = "";
s_help = "";
f_help = "";

// Define the reply tags
reply = 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;

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

function checkForm() {

	formErrors = false;

	if (document.reply.bericht.value.length < 2) {
		formErrors = "You must enter a message when posting";
	}

	if (formErrors) {
		alert(formErrors);
		return false;
	} else {
		bbstyle(-1);
		return true;
	}
}

function bbstyle(bbnumber) {

	donotinsert = false;
	theSelection = false;
	bblast = 0;

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

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

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

		if (imageTag && (bbnumber != 14)) {		// Close image tag before adding another
			document.reply.bericht.value += bbtags[15];
			lastValue = arraypop(reply) - 1;	// Remove the close image tag from the list
			document.reply.addreply14.value = "Img";	// Return button back to normal state
			imageTag = false;
		}

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

// 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();
}