var isLoaded = false;
function showMap() {
	document.getElementById('phmap').style.visibility = 'visible';
	if (!isLoaded) {
		document.getElementById('mapframe').src = 'http://maps.google.de/maps/ms?hl=de&ie=UTF8&om=1&s=AARTsJralwrKjv9R1EiUw-COuc_lCyZFiQ&msa=0&msid=118005329119070203924.000442fd12bc181ef33d0&ll=51.234407,10.283203&spn=7.707574,9.667969&z=6&output=embed'
		isLoaded = true;
	}
}
function hideMap() {
	document.getElementById('phmap').style.visibility = 'hidden';
}