function ValidaCod(dig){
  var ori = document.form1.cod_.value;
	if(dig.length>5){
	    if(dig == ori){
		   document.form1.bt.disabled = false;
		   document.getElementById('Result').innerHTML = "<font color='#FFFFFF'>Código Correto!</font>";
	    }else{
		   document.form1.bt.disabled = true;
		   document.getElementById('Result').innerHTML = "<font color='#FF0000'>Código Errado!</font>";
	    }
	}else{
		document.getElementById('Result').innerHTML = "";
	}
}