function userClear(){
	
	var userDate = document.getElementById('login').value;
		if (userDate == 'login'){	document.getElementById("login").value = ''; } 

	var pswDate = document.getElementById('senha').value;
		if (pswDate == 'senha'){	document.getElementById("senha").value = ''; } 
}

function focalizar(foco_campo){ 
	document.getElementById(foco_campo).focus(); 
}