function postformtree(Page, QueryString) {
	document.formtree.action = Page+QueryString;
	document.formtree.submit();
}

function Selecteerkaart() {
	var cKaart = document.forms[0].kaarten.value;
	parent.document.getElementById("frmGis").src = 'terreinen_gis.asp?kaart=' + cKaart;
}

function terrein(nID) {
	document.getElementById("frmInfo").src = 'terreininfo.asp?id=' + nID;
}

var isInternetExplorer = navigator.appName.indexOf("Microsoft") != -1; // Handle all the FSCommand messages in a Flash movie.

function MapSymbols_DoFSCommand(command, args) {
	var MapSymbolsObj = isInternetExplorer ? document.all.MapSymbols : document.MapSymbols;
	if (command == 'Symbol command') {
		terrein(args);
	}
}

// Hook for Internet Explorer.
if (navigator.appName && navigator.appName.indexOf("Microsoft") != -1 && navigator.userAgent.indexOf("Windows") != -1 && navigator.userAgent.indexOf("Windows 3.1") == -1) {
	document.write('<script language=\"VBScript\"\>\n');
	document.write('On Error Resume Next\n');
	document.write('Sub MapSymbols_FSCommand(ByVal command, ByVal args)\n');
	document.write('	Call MapSymbols_DoFSCommand(command, args)\n');
	document.write('End Sub\n');
	document.write('</script\>\n');
}