function switchAbout(page)
{	
	var url = base_url + 'about/tools';
	var pars = "ajax=1&page=" + page;
	var myAjax = new Ajax.Updater('ajaxDiv', url, {method: 'post', parameters: pars} );
	refresh_aboutLeft(page);
}

function refresh_aboutLeft(page)
{
	var url = base_url + 'about/left_menu';
	var pars = "ajax=1&page=" + page;
	var myAjax = new Ajax.Updater('ma_left', url, {method: 'post', parameters: pars,asynchronous: false});
}