function nl2br(str) {
   return str.replace(/\n/g,"<br>");
}

String.prototype.br2nl= function()
	{ 
	chaine = this.split('<br>').join('\n');
	chaine  = chaine.split('<BR>').join('\n');
	return chaine;
	}
	
String.prototype.br2nl2= function()
	{ 
	chaine = this.split('<br>').join('');
	chaine = chaine.split('<BR>').join('\n');
	return chaine;
	}