$(function() {
	$(".jj").click(function() {
		var kg = $(this);
		dqzk(kg);
	});
})
function dqzk(o) {
	var kg = o;
	var zd = kg.parent().next();
	var zcd = $(".zcd").not(zd);
	zcd.slideUp();
	$(".jj").css( {
		background : "url(../img/jia.jpg) no-repeat"
	});
	zd.slideDown("fast", function() {
		kg.css( {
			background : "url(../img/jian.jpg) no-repeat"
		});
	});
}