var swfWidth = 995;
var swfHeight = 579;
var leftMargin = (screen.availWidth - swfWidth)/2; 
var topMargin = (screen.availHeight - swfHeight)/2; 

function popGecco() {
    var w = screen.availWidth;
    var h = screen.availHeight;
    var windowFeatures = "width=" + swfWidth + ",height=" + swfHeight + ",";
    windowFeatures += "left=" + leftMargin + ",top=" + topMargin + ",";
    windowFeatures += "location=no,";
    windowFeatures += "menubar=no,";
    windowFeatures += "resizable=no,";
    windowFeatures += "scrollbars=no,";
    windowFeatures += "status=no,";
    windowFeatures += "toolbar=no";
	var gWindow = window.open("start.html", "geccoWin", windowFeatures);
	if (gWindow != null) {
		window.top.opener=self;
		window.top.close()
	}
}

function toggle(targetId) {
	target = document.getElementById(targetId);
	target.style.display = (target.style.display == "none") ? "" : "none";
}