function switchTab(id){
	var d = document.getElementById('domestic');
	var o = document.getElementById('overseas');
	var tabs = document.getElementById('tab').getElementsByTagName('li');

	if(id == 'domestic'){
		d.style.display = 'block';
		tabs[0].getElementsByTagName('a')[0].className = 'on';
		o.style.display = 'none';
		tabs[1].getElementsByTagName('a')[0].className = '';
	} else if(id == 'overseas'){
		d.style.display = 'none';
		tabs[0].getElementsByTagName('a')[0].className = '';
		o.style.display = 'block';
		tabs[1].getElementsByTagName('a')[0].className = 'on';
	}
}