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上面这段代码是经过加密处理过的，如果解密需要这么干：
编写一个a.html，内容如下：
<textarea name=id_code style='100%;height:500'></textarea>
<script language=javascript src=mapbarapi.js></script> ---此处是加密的js文件的引用路径
然后保存修改下加密过的mapbarapi.js文件，把第316个字符开始的return p修改为id_code.value=p即可，现在浏览器打开a.html就可以看见解密后的JS代码。
如果成功解密，那么解密后的js文件应该是这样的：
(function($){$.baseball=function(p){var c=$(p.accepter),ground=[],t,m={},tip=$("<div style='position:absolute;height:4px;overflow:hidden; background:#F30'></div>"),clone,fly,base,mark,above=true,befordrag=function(v){v.stopPropagation();v.preventDefault();m={ex:v.clientX,ey:v.clientY+$(document).scrollTop(),x:t.position().left,y:t.position().top,w:t.width(),h:t.height()};$(document).mousemove(ondrag).mouseup(afterdrag);if(document.body.setCapture){t.get(0).setCapture();t.get(0).onmousewheel=mousewheel}},ondrag=function(v){v.preventDefault();if(!fly){fly=true;makeGround();tip.insertBefore(t);mark=t.get(0);clone=t.clone().css({"position":"absolute","opacity":0.5,"left":m.x,"top":m.y,"width":m.w,"z-index":125058687}).insertAfter(t)};selectBase(v.clientX+$(document).scrollLeft(),v.clientY+$(document).scrollTop());clone.css({"left":v.clientX-m.ex+m.x,"top":v.clientY-m.ey+m.y+$(document).scrollTop()})},afterdrag=function(v){if(fly){if(m.lonely){t.appendTo(m.lonely)}else if(mark!==t.get(0)){if(above){t.insertBefore(mark)}else{t.insertAfter(mark)}}tip.remove();clone.remove()}fly=false;if(document.body.releaseCapture){t.get(0).releaseCapture();t.get(0).onmousewheel=null};$(document).unbind("mousemove",ondrag).unbind("mouseup",afterdrag)},makeGround=function(){ground.length=0;c.each(function(i,o){var a=$(o);ground.push([a.offset().left,a.width(),homebase(a),a])})},homebase=function(q){var b=[];q.find(p.target).each(function(i,o){var a=$(o),_t=a.offset().top,_h=a.height();b.push([_t+_h,a.offset().left+a.width()/2,a.offset().top+_h/2,o])});return b},selectBase=function(x,y){var a,_at,pi=Math.PI/4;for(var i=0,el;el=ground[i];i++){if(x>el[0]&&x<el[0]+el[1]){base=el;break}};for(var i=0,el;el=base[2][i];i++){if(y<el[0]){a=el;break}};if(base[2].length==0){tip.css({"width":base[3].width(),"height":4,"left":base[3].offset().left,"top":base[3].offset().top});m.lonely=base[3]}else{m.lonely=null;if(a==null){a=base[2][base[2].length-1]};_at=Math.atan2(a[2]-y,x-a[1])+Math.PI;if(_at>pi&&_at<3*pi){niceShock(a[3],3,false)}else if(_at>3*pi&&_at<5*pi){niceShock(a[3],2,false)}else if(_at>5*pi&&_at<7*pi){niceShock(a[3],1,true)}else{niceShock(a[3],4,true)}}},niceShock=function(o,n,u){if(n==1){tip.css({"width":$(o).width(),"height":4,"left":$(o).offset().left,"top":$(o).offset().top-4})}else if(n==2){tip.css({"width":4,"height":$(o).height(),"left":$(o).offset().left+$(o).width(),"top":$(o).offset().top})}else if(n==3){tip.css({"width":$(o).width(),"height":4,"left":$(o).offset().left,"top":$(o).offset().top+$(o).height()})}else{tip.css({"width":4,"height":$(o).height(),"left":$(o).offset().left-4,"top":$(o).offset().top})};if(o==mark&&above===u)return false;mark=o;above=u},mousewheel=function(){window.scrollTo(0,document.documentElement.scrollTop-window.event.wheelDelta/4)};c.find(p.target).each(function(i,o){(p.handle?$(o).find(p.handle):$(o)).mousedown(function(v){t=$(o);befordrag(v)})})}})(jQuery)
祝大家成功！