function praesentation(lang) {
	if(lang == "de") {
		window.open("de/index_praesentation.html", "praesentation", "width=870, height= 630");
	}
	if(lang == "en") {
		window.open("en/index_praesentation.html", "praesentation", "width=870, height= 630");
	}
	if(lang == "fr") {
		window.open("fr/index_praesentation.html", "praesentation", "width=870, height= 630");
	}
}

function direction_map1(lang) {
	if(lang == "de") {
		window.open("anfahrt_plan1.html", "praesentation", "width=605, height= 415");
	}
	if(lang == "en") {
		window.open("directions_plan1.html", "praesentation", "width=605, height= 415");
	}
	if(lang == "fr") {
		window.open("situation-geographique-plan1.html", "praesentation", "width=605, height= 415");
	}
}

function direction_map2(lang) {
	if(lang == "de") {
		window.open("anfahrt_plan2.html", "praesentation", "width=628, height= 627");
	}
	if(lang == "en") {
		window.open("directions_plan2.html", "praesentation", "width=628, height= 627");
	}
	if(lang == "fr") {
		window.open("situation-geographique-plan2.html", "praesentation", "width=628, height= 627");
	}
}