function openWindow(url, window_width, window_height) {
	var h = screen.height
	var w = screen.width
	var l = parseInt((w-window_width)/2)
	var t = parseInt((h-window_height)/2)
	window.open(url,'','status=no,width='+window_width+',height='+window_height+',left='+l+',top='+t)
}

function panelAction(img, event) {

	if (event == "over") {
		if (img == "haus") {
			var i = document.getElementById("imgHaus");
			i.src = "images/panel_haus_hover.jpg";
		}

		if (img == "garten") {
			var i = document.getElementById("imgGarten");
			i.src = "images/panel_garten_hover.jpg";
		}

		if (img == "pool") {
			var i = document.getElementById("imgPool");
			i.src = "images/panel_pool_hover.jpg";
		}	
	} else {
		if (img == "haus") {
			var i = document.getElementById("imgHaus");
			i.src = "images/panel_haus_img.jpg";
		}

		if (img == "garten") {
			var i = document.getElementById("imgGarten");
			i.src = "images/panel_garten_img.jpg";
		}

		if (img == "pool") {
			var i = document.getElementById("imgPool");
			i.src = "images/panel_pool_img.jpg";
		}	
	}

}