function checkLogin (username, password, destination)
{
	var isLogin = true;
	
	if(username == '')
	{
		isLogin = false;
	}
	
	if(password == '')
	{
		isLogin = false;
	}
	
	if(!isLogin)
	{
		alert('Invalid Login Information');		
	}
	else
	{
		destination.submit();
	}
}