var g_iCurrentID=0;
var g_sMenus=[['menu0','menu1','menu2','menu3','menu4'],['menu5','menu6','menu7','menu8','menu9']];
//var g_sMenus = [];
//g_sMenus[0] = ['menu0','menu1','menu2','menu3','menu4'];
//g_sMenus[1] = ['menu5','menu6','menu7','menu8','menu9'];
//var g_sMenus=[['menu0','menu1','menu2','menu3','menu4'],['menu5','menu6','menu7','menu8','menu9']];

function menu(index)
{
	var i;
	if (index != g_iCurrentID)
	{
		for (i = 0; i < g_sMenus[g_iCurrentID].length; i++)
			document.getElementById(g_sMenus[g_iCurrentID][i]).style.visibility='hidden';

		for (i = 0; i < g_sMenus[index].length; i++)
			document.getElementById(g_sMenus[index][i]).style.visibility='';

	        g_iCurrentID=index;
	}
}