function initializeTabs() {
	if (document.getElementById('panels')) {
		// home page only
		document.getElementById('panel1').style.display = 'block';
		document.getElementById('tab1').className = 'tabOff';
		document.getElementById('tab1').onmousedown = tabClick;
		document.getElementById('tab2').className = 'tabOff';
		document.getElementById('tab2').onmousedown = tabClick;
		document.getElementById('tab3').className = 'tabOn';
		document.getElementById('tab3').onmousedown = tabClick;
		document.getElementById('tab4').className = 'tabOff';
		document.getElementById('tab4').onmousedown = tabClick;
		document.getElementById('tab5').className = 'tabOff';
		document.getElementById('tab5').onmousedown = tabClick;
		document.getElementById('tab6').className = 'tabOff';
		document.getElementById('tab6').onmousedown = tabClick;
	}
}
function tabClick() {
	var tabs = document.getElementById('tabs').getElementsByTagName('div');
	var panels = document.getElementById('panels').getElementsByTagName('div');
	for (i = 0; i < tabs.length; i++) {
		tabs[i].className = 'tabOff';
		panels[i].style.display = 'none';
		if (this == tabs[i]) panels[i].style.display = 'block';
	}
	this.className = 'tabOn';
}