window.addEvent('domready', function() {
var accordion = new Accordion('div.t1', 'div.t2', {
start:'all-closed',
opacity: false,
duration: 500,
alwaysHide: true,
onActive: function(togglers, stretchers){
togglers.setStyle('background-image', 'url(/images/tabBg.gif)');
togglers.setStyle('background-position', 'left top');
togglers.setStyle('background-repeat', 'no-repeat');
},

onBackground: function(togglers, stretchers){
togglers.setStyle('background-image', 'url(/images/tabBg.gif)');
togglers.setStyle('background-position', 'left top');
togglers.setStyle('background-repeat', 'no-repeat');

stretchers.setStyle('height', stretchers.offsetHeight);

$$('div.t3').setStyle('height','0');//you close all sub accordion
}
}, $('sidebar'));
var accordion1 = new Accordion( {
start:'all-closed',
opacity: false,
duration: 100,
alwaysHide: true,
onActive: function(togglers, stretchers){
togglers.getParent().setStyle("height", "auto");
},
onBackground: function(togglers, stretchers){
stretchers.setStyle('height',stretchers.offsetHeight);
}
}, $('sidebar'));
});