jQuery侧边悬浮窗口折叠显示隐藏文字列表

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$(function(){
	
	$('.main').css('left','-262px');
	
	var expanded = true;
	
	$('.bar').click(function(){
		if(expanded){
			$('.main').animate({left:'0'},500);
			$('.bar').css('background-position','-25px 0px');
		}else{
			$('.main').animate({left:'-262px'},500);
			$('.bar').css('background-position','-0px 0px');
		}
		expanded = !expanded;
	});

});