function MM_formtCep(e,src,mask)
	{	if(window.event)
			{ _TXT = e.keyCode;
			}
		else
			if(e.which) { _TXT = e.which; }
			if(_TXT > 47 && _TXT < 58)
				{ 	var i = src.value.length; var saida = mask.substring(0,1); var texto = mask.substring(i)
					if (texto.substring(0,1) != saida) { src.value += texto.substring(0,1); } 
					return true;
				}
			else
				{ if (_TXT != 8)
					{ return false; }
				else
					{ return true; }
				}
				
	}