function resetTabs() {
	if (document.getElementById) {
		for (var i=0; i<20; i++) {
			if (document.getElementById("tab"+i) == null) break;
			document.getElementById("tab"+i).style.display = 'none';
			document.getElementById("tab"+i+"link").className = '';			
		}
	}
	else if (document.all) {
		for (var i=0; i<20; i++) {
			if (document.all["tab"+i] == null) break;
			document.all["tab"+i].style.display = 'none';
			document.all["tab"+i+"link"].className = '';			
		}
	}
}
function showhide(id) {
	if (document.getElementById) {
		if (document.getElementById("tab"+id).style.display == 'none') {
			resetTabs();
			document.getElementById("tab"+id+"link").className = 'selected';
			document.getElementById("tab"+id).style.display = 'block';
		}
	}
	else if (document.all) {
		if (document.all["tab"+id].style.display == 'none') {
			resetTabs();
			document.all["tab"+id+"link"].className = 'selected';
			document.all["tab"+id].style.display = (current=='block')? 'none' : 'block';
		}
	}
}