function TogglePanel (prefix)
{
    if (document.getElementById(prefix  + "_panel").style.display == "none")
    {
        document.getElementById(prefix + "_panel").style.display = "block";
        document.getElementById(prefix + "_img").src = "uploads/flip_minus.jpg";
        document.getElementById(prefix + "_img").alt = "Ausblenden";
        document.getElementById(prefix + "_img").title = "Ausblenden";
	}
	else
	{
        document.getElementById(prefix + "_panel").style.display = "none";
        document.getElementById(prefix + "_img").src = "uploads/flip_plus.jpg";
        document.getElementById(prefix + "_img").alt = "Einblenden";
        document.getElementById(prefix + "_img").title = "Einblenden";
    }
}