function isUsernameBlank(f) { 
	if ((f.value == "") || (f.value == " ")) {
		alert('Please complete the Username field')
		f.focus();
		return false; 
	}
	else return true;
}

function isPasswordBlank(f) { 
	if ((f.value == "") || (f.value == " ")) {
		alert('Please complete the Password field')
		f.focus();
		return false; 
	}
	else return true;
}

function validate(f) {  
	if (!isUsernameBlank(f.LoginUsername)) return false;
	if (!isPasswordBlank(f.LoginPassword)) return false;
	return true;
}