var active_tab = Array();
function activate_tab(a,tabname,tabarea) {
	if(tabname != active_tab[tabarea]) {
		var aTab;
		var bTab;
					
		aTab = document.getElementById(tabname);
		aTab.style.display = '';
		aTabLink = document.getElementById('link_' + tabname);
		aTabLink.className = 'current';
					
		bTab = document.getElementById(active_tab[tabarea]);
		bTab.style.display = 'none';
		bTabLink = document.getElementById('link_' + active_tab[tabarea]);
		bTabLink.className = '';
					
		active_tab[tabarea] = tabname;
	}
}