jquery实现点击切换图标

$(".statistic_table_head_date").bind("mousedown", function () {        $(".statistic_table_head_date img:nth-child(1)").attr("src", "img/date_active.png");                   $(".statistic_table_head_date img:nth-child(2)").attr("src", "img/open_active.png");            }).bind("mouseup", function () {                   $(".statistic_table_head_date img:nth-child(2)").attr("src", "img/open.png");            })

采用bind方法，mousedown是鼠标点击下去的时候触发，mouseup是鼠标抬起的时候，