function expandTextArea(){
	var testo = MM_findObj('expand_link');	
	var big = false;					
	var tarea = MM_findObj('content_textarea');
	
	if(tarea.className == "msg_input_textarea") {		
		tarea.className = "msg_input_textarea_big";		
		big = true;		
	}
	else tarea.className = "msg_input_textarea";				
	
	if(big) testo.innerHTML = "Riduci area di testo";
	else testo.innerHTML = "Espandi area di testo";
	
	return false;
}

function MM_findObj(n, d) { 
  var p,i,x;  
  
  if(!d) d=document; 
  
  d=parent.document; 
  
 
  if(!(x=d[n])&&d.all) x=d.all[n]; 
  for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n);
   
  return x;
}

function MM_setTextOfTextfield(objName,x,newText) { 
	var txtarea = MM_findObj(objName); 
	
	if (document.selection)
	{
		txtarea.focus();
		sel = document.selection.createRange();
		sel.text = newText;
	}
	else if (txtarea.selectionStart || txtarea.selectionStart == '0') 
	{
		var selLength = txtarea.textLength;
		var selStart = txtarea.selectionStart;
		
		var s1 = (txtarea.value).substring(0,selStart);
		var s2 = (txtarea.value).substring(selStart, selLength);
		
		//alert("valori: selStart="+selStart+" selLength="+selLength);
		txtarea.value = s1 + newText + s2 ;
		txtarea.selectionStart = selStart + newText.length;
		txtarea.selectionEnd = txtarea.selectionStart;
		txtarea.focus();
		
		return;
	}
	else txtarea.value += newText;
}

// 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
b_help = "Grassetto: [b]testo[/b]  (alt+b)";
i_help = "Corsivo: [i]testo[/i]  (alt+i)";
u_help = "Sottolineato: [u]testo[/u]  (alt+u)";
q_help = "Citazione: [quote]testo[/quote]  (alt+q)";
c_help = "Center: [center]testo[/center]  (alt+c)";
l_help = "Lista: [list]testo[/list] (alt+l)";
o_help = "Lista ordinata: [list=]testo[/list]  (alt+o)";
p_help = "Inserisci un'immagine: [img]http://image_url[/img]  (alt+p)";
w_help = "Inserisci URL: [url]http://url[/url] o [url=http://url]testo URL[/url]  (alt+w)";
a_help = "Chiudi tutti i tags aperti";
s_help = "Colore font: [color=red]testo[/color]  Suggerimento: puoi anche usare color=#FF0000";
f_help = "Dimensione font: [size=x-small]testo piccolo[/size]";

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

// Shows the help messages in the helpline window
function helpline(help) {
	document.msg_form.helpbox.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 trim(inputString) {
   // Removes leading and trailing spaces from the passed string. Also removes
   // consecutive spaces and replaces it with one space. If something besides
   // a string is passed in (null, custom object, etc.) then return the input.
   if (typeof inputString != "string") { return inputString; }
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
   while (ch == " ") { // Check for spaces at the beginning of the string
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
   while (ch == " ") { // Check for spaces at the end of the string
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
   while (retValue.indexOf("  ") != -1) { // Note that there are two spaces in the string - look for multiple spaces within the string
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings
   }
   return retValue; // Return the trimmed string back to the user
} // Ends the "trim" function

function checkMsgForm(tipo,form,titolo,autore,captcha) {

	formErrors = false;
	
	if(tipo == "submit" && form.password_autore != undefined) {
		if(trim(form.password_autore.value) == "" ) {
			formErrors = "Manca la password!";
			form.password_autore.focus();
		}
	}
	else if (tipo == "submit" && captcha == 1 && trim(form.user_code.value) == "" )
	{
		formErrors = "Manca il codice di verifica!";
		form.user_code.focus();
	}
	
	if (titolo == 1 && trim(form.titolo.value) == ""  )
	{
		formErrors ="Manca il titolo!";
		form.titolo.focus();
	}
	
	if (trim(form.contenuto.value) == "" )
	{
		formErrors = "Manca il contenuto del messaggio!";
		form.contenuto.focus();
	}
	
	if (autore == 1 && trim(form.autore.value) == "" )
	{
		formErrors = "Manca l'autore!";
		form.autore.focus();
	}
	
	

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


function bbfontstyle(bbopen, bbclose) {
	var txtarea = document.msg_form.contenuto;

	if ((clientVer >= 4) && is_ie && is_win) {
		theSelection = document.selection.createRange().text;
		if (!theSelection) {
			MM_setTextOfTextfield('contenuto',"",bbopen + bbclose);
			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
	{
		MM_setTextOfTextfield('contenuto',"",bbopen + bbclose);
	}
	storeCaret(txtarea);
}


function bbstyle(bbnumber) {
	var txtarea = document.msg_form.contenuto;

	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;
			MM_setTextOfTextfield('contenuto',"",bbtags[butnumber + 1]);
			buttext = eval('document.msg_form.addbbcode' + butnumber + '.value');
			eval('document.msg_form.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;
				MM_setTextOfTextfield('contenuto',"",bbtags[butnumber + 1]);
				buttext = eval('document.msg_form.addbbcode' + butnumber + '.value');
				eval('document.msg_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
			MM_setTextOfTextfield('contenuto',"",bbtags[15]);
			lastValue = arraypop(bbcode) - 1;	// Remove the close image tag from the list
			document.msg_form.addbbcode14.value = "Img";	// Return button back to normal state
			imageTag = false;
		}

		// Open tag
		MM_setTextOfTextfield("contenuto","",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.msg_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;
	txtarea.selectionStart = selStart + (open + s2 + close).length;
	txtarea.selectionEnd = txtarea.selectionStart;
	txtarea.focus();
	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();
}