/**
 * @version  1.00
 * @updated  2008/09/10
 */


function tab(elm) {
	var li = document.getElementById('tab').getElementsByTagName('li');
	for (i = 0; i < li.length; i++) {
		li[i].className = '';
	}
	
	var div = document.getElementsByTagName('div');
	for (i = 0; i < div.length; i++) {
		if (div[i].className == 'box_current') {
			div[i].className = '';
		}
	}
	
	elm.parentNode.className = 'on';
	var on = elm.parentNode.id;
	
	var current = 'box_' + on;
	
	for (i = 0; i<div.length; i++) {
		if (div[i].id == current) {
			div[i].className = 'box_current';
		}
	}
}