//last_tab = 'tab-patrick';
function show(layerName) {
	document.getElementById(layerName).style.display = '';
}
function hide(layerName) {
	document.getElementById(layerName).style.display = 'none';
}
function show_next(tab_name) {
	var tab_id = tab_name.substring(4);
	var last_tab_id = last_tab.substring(4);
	//confirm('Inactive: ' + last_tab + 'class: ' + 'tab tab-' + tab_id);
	document.getElementById(last_tab).className = 'tab tab-' + last_tab_id;
	var curr = document.getElementById(tab_name);
	//confirm('Active: ' + curr + 'class: tab-hover tab-hover-' + tab_id);
	curr.className='tab-hover tab-hover-' + tab_id;
	hide(last_tab+'-data');
	show(tab_name+'-data');
	last_tab=tab_name;
}