function updateStockPrice(price, currency, label) {
	var divStockPrice = document.getElementById('body-tools-stockchart-currentprice');
	if (divStockPrice != null) { divStockPrice.innerHTML = label + ' ' + currency + ' ' +  price ; }
}
function updateStockChart(obj) {
	/* button colors */
	var buttonColorActive = 'rgb(0,138,196)';
	var buttonColorInactive = 'rgb(194,201,207)';
	/* get all involved elements */
	var divButtonMonth = document.getElementById('body-tools-stockchart-buttons-month');
	var divButtonIntraday = document.getElementById('body-tools-stockchart-buttons-intraday');
	var divChartMonth = document.getElementById('body-tools-stockchart-graph-monthchart');
	var divChartIntraday = document.getElementById('body-tools-stockchart-graph-intradaychart');
	
	/* abort if one of the elements is missing */
	if (divButtonMonth == null || divButtonIntraday  == null || divChartMonth == null || divChartIntraday  == null) { return; };
	
	/* update elements */
	if (obj == divButtonMonth) {
		divButtonMonth.style.backgroundColor = buttonColorActive;
		divButtonIntraday.style.backgroundColor = buttonColorInactive;
		divChartMonth.style.visibility = 'visible';
		divChartMonth.style.position = 'static';
		divChartIntraday .style.visibility = 'hidden';
		divChartIntraday .style.position = 'absolute';
	} else {
		if (obj == divButtonIntraday) {
			divButtonMonth.style.backgroundColor = buttonColorInactive;
			divButtonIntraday.style.backgroundColor = buttonColorActive;
			
			divChartIntraday.style.visibility = 'visible';
			divChartIntraday.style.position = 'static';
			divChartMonth .style.visibility = 'hidden';
			divChartMonth .style.position = 'absolute';
		}
	}
}