function selectTab(id) {
	
	var tabs= document.getElementById('tab_area').childNodes;
	var isDefault = false;

	for (var i = 0; i < tabs.length; i++ ){
		var item = tabs[i];

		// Change tab
		if (item.nodeName != 'DIV') continue;
		
		if (item.className.indexOf('tab_menu') >= 0) {
			var tabMenus = item.childNodes;
				
			for (var j = 0; j < tabMenus.length; j++) {
				var tabMenu = tabMenus[j];
				if (tabMenu.nodeName == 'A') {
				
					if (id == ''&& j == 0) {
						var tabId = tabMenu.id;
						id = tabId.replace(/tab_menu_/g, '');
					}
					
					if (tabMenu.id == 'tab_menu_' + id) 
						tabMenu.className = 'selected';
					else tabMenu.className = '';
				}
			}
		
		} else {
			item.className = item.className.replace(/tab_area/g, "").replace(/hidden/g, "");
			item.className += ' tab_area';
			if (id != item.id) item.className += ' hidden';
		}
	}
}

function selectTab2(id) {
	
	var tabs= document.getElementById('tab_area2').childNodes;
	var isDefault = false;

	for (var i = 0; i < tabs.length; i++ ){
		var item = tabs[i];

		// Change tab

		if (item.nodeName != 'DIV') continue;
		
		if (item.className.indexOf('tab_menu2') >= 0) {

			var tabMenus = item.childNodes;
				
			for (var j = 0; j < tabMenus.length; j++) {
				var tabMenu = tabMenus[j];
				if (tabMenu.nodeName == 'A') {
				
					if (id == ''&& j == 0) {
						var tabId = tabMenu2.id;
						id = tabId.replace(/tab_menu2_/g, '');
					}
					
					if (tabMenu.id == 'tab_menu2_' + id) 
						tabMenu.className = 'selected';
					else tabMenu.className = '';
				}
			}
		
		} else {
			item.className = item.className.replace(/tab_area2/g, "").replace(/hidden/g, "");
			item.className += ' tab_area2';

			if (id != item.id) item.className += ' hidden';
		}
	}
}