function onClickPi(){
	toggleVisibility('subpw');
	toggleVisibility('subbtn');
	pwf = document.getElementById('subpw');
	if(pwf.style.visibility == 'visible'){
		pwf.focus();
	}
	else{
		document.getElementById('subbtn').focus();
		pwf.value = '';
	}
}

function toggleVisibility(divId) {
	var d = document.getElementById(divId);
	if(d.style.visibility == 'visible'){
		d.style.visibility = 'hidden';
	}
	else{
		d.style.visibility = 'visible';
	}
}