jQuery 插件 将this下的div轮番显示

/*将this下的div轮番显示dname指定需要执行此动作的元素，如果没有指定dname，将默认全部子元素;tname指定与dname对应的激活元素;speed显示切换速度;effe显示的效果;*/(function(){.fn.w_picSwap=function(dname,tname,speed,effe){speed=speed || 2000;dname=dname || "";tname=tname || "";effe=effe || 1;return this.each(function(){var myTime;var obj=(this);var objs=(this).find(dname);var objnl=(this).find(tname).not(dname);var len2=objnl.length;var len=objs.length;if(len<2){ return;}var si=0;var old=0;objs.not(':first').css('opacity',0);function showImg(){old=si;si=(si==(len-1))?0:si+1;effect(objs.eq(old),objs.eq(si));if(len2){objnl.eq(old).removeClass("on");objnl.eq(si).addClass("on");}};function effect(o,n){switch(effe){case 1:o.stop().animate({opacity:0});n.stop().animate({opacity:1});break;case 2:var toff=o.position();n.stop().css("top",toff.top+o.outerHeight()).animate({top:toff.top,opacity:1},200);o.stop().animate({top:toff.top-o.outerHeight(),opacity:0});break;}}function begin(){myTime = setInterval(showImg,speed);};objnl.mouseover(function(){si=objnl.index(this);showImg();});//滑入 停止动画，滑出开始动画.obj.hover(function(){if(myTime){clearInterval(myTime);}},function(){begin();});begin();});};})(jQuery);