function Querystring(qs) { // optionally pass a querystring to parse
	this.params = new Object();
	this.get=Querystring_get;

	if (qs == null)
		qs=location.search.substring(1,location.search.length);

	if (qs.length == 0) return;

	// Turn <plus> back to <space>
	// See: http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4.1
	qs = qs.replace(/\+/g, ' ');
	var args = qs.split('&'); // parse out name/value pairs separated via &

	// split out each name=value pair
	for (var i=0;i<args.length;i++) {
		var value;
		var pair = args[i].split('=')
			var name = unescape(pair[0]);

		if (pair.length == 2)
			value = unescape(pair[1]);
		else
			value = name;

		this.params[name] = value;
	}
}

function Querystring_get(key, default_) {
	// This silly looking line changes UNDEFINED to NULL
	if (default_ == null) default_ = null;

	var value=this.params[key]
		if (value==null) value=default_;

	return value
}

function formatDate( date ) {
	var text = "";
	return text += date.getDate() + "/" + (date.getMonth()+1) + "/" + date.getFullYear() + " " + date.getHours() + ":" + date.getMinutes();
}

function isShown( tbid ) {
	var status = document.getElementsByName("status");

	for( var i=0; i<status.length; i++ )
		if( status[i].checked && gpsinfo[status[i].value][tbid] )
			return true;

	return false;
}

function DoCenter(poslat, poslong, poslevel)
{
	if (map.getZoom() == poslevel) {
		map.panTo(new GLatLng(poslat, poslong));
	} else {
		map.setCenter(new GLatLng(poslat, poslong), poslevel);
	}
}



function writit(text,id)
{
	if (document.getElementById)
	{
		x = document.getElementById(id);
		x.innerHTML = '';
		x.innerHTML = text;
	}
	else if (document.all)
	{
		x = document.all[id];
		x.innerHTML = text;
	}
	else if (document.layers)
	{
		x = document.layers[id];
		text2 = '<P CLASS="testclass">' + text + '</P>';
		x.document.open();
		x.document.write(text2);
		x.document.close();
	}
}
// Creates a hideable box with a given title in the div with the id boxDivId and inside a div with the id childDivIt to access the content
function makeHideBox( title, boxDivId, childDivId ) {
	var text = "";
	
	text += '<div class="hideBoxBar">'
	// Create a div called boxDivId+"Buttons" and put the - button inside
	text += '<div id="' + boxDivId + 'Buttons" style="float: right;">';
	text += '<a class="arrow" onClick=\'toggleBox("' + boxDivId + '")\' href="javascript:null()" /></a>';
	text += '</div>';
	text += "<h3>" + title + "</h3>";
	text += '</div>';

	text += '<div id="' + boxDivId+ 'Effect"><div id="' + childDivId + '"></div></div>';

	writit( text, boxDivId );
}

// Hide the content of the hidable box with the id boxDivId
function toggleBox( boxDivId ) {
	new Effect.toggle( boxDivId + "Effect", 'blind' );
	//text = '<a href="#" onClick=\'toggleBox("' + boxDivId + '")\'>+/-</a>';
	//writit( text, boxDivId + "Buttons" );
}