var whichAcc;
function accordion(){
	$("ul.nav2 li.acc_head").click(function(){
		if (whichAcc != this.id){
			$("ul.nav2 li").removeClass("active");
			$("ul.acc_body").slideUp("fast");
			$(this).addClass("active");			
			$("li#"+this.id+" ul").slideDown("fast");
			whichAcc = this.id;
		}
		else {
			$(this).removeClass("active");			
			$("li#"+this.id+" ul").slideUp("fast");
			whichAcc = "";
		}
	});
}