Janela de aviso

Olá pessoal http://forum.imasters.com.br/public/style_emoticons/default/thumbsup.gif Eu tenho um pequeno código que faz a palavra ficar em negrito e Itálico. Quando aperto no link negrito abre abas <b> quando aperto novamente fecha abas </b>. Eu queria saber como posso fazer para quando o usuário abrir abas sem fechar apareça uma mensagem dizendo que tem abas abertas.

O meu código:

function Selection(idTextArea){	this.idTextArea = idTextArea	this.selectionLength = 0;	this.selectionStart = 0;	this.selectionEnd = 0;	this.getSelectionText = getSelText;	this.setSelectionText = setSelText;	this.txtObj = document.getElementById(idTextArea); if(document.selection)	{ this.txtObj.focus(); var range = document.selection.createRange().duplicate(); this.selectionLength = range.text.length; var i = this.txtObj.value.length + 1; range.collapse(true); while(range.parentElement() == this.txtObj && range.move("character",1)==1 ) { i--; } if(i) { this.selectionStart = i; this.selectionEnd = this.selectionStart + this.selectionLength; } }	else { this.selectionLength = this.txtObj.selectionEnd - this.txtObj.selectionStart; this.selectionStart = this.txtObj.selectionStart; this.selectionEnd = this.txtObj.selectionEnd;	}}function setSelText(strText){	if(document.selection) { this.txtObj.focus(); var range = document.selection.createRange(); range.text = strText; range.move("character", range.text.length); this.txtObj.focus();	}	else	{ var arrtext = new Array(); arrtext[arrtext.length] = this.txtObj.value.substr(0, txt.selectionStart); arrtext[arrtext.length] = strText; arrtext[arrtext.length] = this.txtObj.value.substr(this.txtObj.selectionEnd); var rangeStart = this.txtObj.selectionStart + strText.length; var rangeEnd = rangeStart; this.txtObj.value = arrtext.join(''); this.txtObj.focus(); this.txtObj.setSelectionRange(rangeStart, rangeEnd);	}}function getSelText(){	if (document.selection)	{ this.txtObj.focus(); var range = document.selection.createRange(); return range.text }	else	{ var text = this.txtObj.value.substr(this.txtObj.selectionStart, this.selectionLength); return text;	}}function getLink(){	var url = prompt("Insira a URL no campo abaixo", "www.");	var text = prompt("Insira o título do link", '');	var arrData = new Array();	arrData[arrData.length] = (url == null) ? '' : url;	arrData[arrData.length] = (text == null) ? '' : text;	return arrData;}var arrTags = new Array();function insertCode(textarea, code, hasCloseTag){	var bbcode = "<" + code + ">";	var bbcodeclose = "</" + code + ">"; txt = document.getElementById(textarea);	var selection = new Selection(textarea); if(selection.selectionLength == 0)	{ if(hasCloseTag && code != 'a href') { re = new RegExp(".*\\<(\\/*)" + code + "\\>.*$"); var text = txt.value.substr(0, selection.selectionStart); if( re.test(text) ) { match = re.exec(text); if(match[1] == "/") { selection.setSelectionText(bbcode); if(!arrTags[""+textarea+""].length) arrTags["" + textarea + ""] = new Array(); arrTags["" + textarea + ""]["" + code + ""] = code; } else { selection.setSelectionText(bbcodeclose); } } else { selection.setSelectionText(bbcode); } } else if(hasCloseTag && (code == 'a href')) { switch(code) { case 'a href': var arrData = getLink(); if (arrData[0] && arrData[1]) { bbcode = '<'+ code +'="http://' + arrData[0] + '" target="_blank">'+ arrData[1] +'</a>'; selection.setSelectionText(bbcode); } break; } } else { selection.setSelectionText(bbcode); }	}	else	{ if(hasCloseTag && code != 'a href') { selection.setSelectionText(bbcode + selection.getSelectionText() + bbcodeclose); } else if(hasCloseTag && (code == 'a href')) { switch(code) { case 'a href': var arrData = getLink(); if (arrData[0] && arrData[1]) { bbcode = '<'+ code +'="http://' + arrData[0] + '" target="_blank">'+ arrData[1] +'</a>'; selection.setSelectionText(selection.getSelectionText() + bbcode); } break; } } else { selection.setSelectionText(selection.getSelectionText() + bbcode); }	}}function searchText(textarea, strURL){	var selection = new Selection(textarea);	var searchText = ""; if (selection.selectionLength == 0)	{ searchText = prompt("Digite a palavra a ser consultada", ""); if (searchText == null) { return; }	}	else	{ searchText = selection.getSelectionText();	}	strURL = strURL.replace('%s', escape(searchText)); window.open(strURL, '_blank'); }