function valida(myForm) { 
	Tvalida = 1
	if ((myForm.nick.value == ""))		
		{ myForm.nick.style.backgroundColor="#D02E2E"; myForm.nick.focus(); Tvalida = 0; } 
	else 
		{ myForm.nick.style.backgroundColor="#EBEBEB";}
	
	if ((myForm.passwd.value == ""))
		{ myForm.passwd.style.backgroundColor="#D02E2E"; myForm.passwd.focus(); Tvalida = 0;} 
	else
		{ myForm.passwd.style.backgroundColor="#EBEBEB";}

	
	if (Tvalida==1)
		return true; 
	else
		return false;
}