这段加密的js怎样解密？

<script>
/* Copyright 2009, SiteSpect, Inc. All Rights Reserved. */
if(!window.SS){var SS={}}SS.Cookie=function(){var c="v";function g(h,j,i){return encodeURIComponent(h)+"="+encodeURIComponent(j)+(i||"")
}function b(i,k){var j=new RegExp(i+"=([^;]*)");var h=k.match(j);if(h&&h.length>0){return decodeURIComponent(h[1])}return""}function e(h){return h.split(c)}function a(h){return h.join(c)
}function f(h,i){var j=b(h,document.cookie);if(!j){return""}if(i){i=i.substr(0,1).toLowerCase()}switch(i){case"s":return j;case"a":return e(j);default:return(j.match(c))?e(j):j
}}function d(h,j,i){if(j.join){j=a(j)}document.cookie=g(h,j,i)}return{get:f,set:d}}();SS.EventTrack=function(){var c="";var i=true;var a=[];function h(k){a[a.length]=k
}function f(k){k+="-3";var n="SS.IMG"+Math.floor(Math.random()*99999999);var l='<img src="'+k+'" height="1" width="1" border="0" id="'+n+'" />';if(document.body&&document.body.innerHTML){document.body.innerHTML+=l
}else{document.write(l)}if(document.getElementById){var m=document.getElementById(n);h(m)}}function g(k,m){var l=(new Date().getTime())+Math.floor(Math.random()*99999999);
return c+"?event="+encodeURIComponent(k)+"&value="+encodeURIComponent(m||"")+"&x="+l}function e(k){k+="-1";try{var l=window.ActiveXObject?new ActiveXObject("Microsoft.XMLHTTP"):new XMLHttpRequest();
l.open("GET",k,false)}catch(o){return false}try{l.setRequestHeader("X-Requested-With","XMLHttpRequest");l.setRequestHeader("Accept","*/*")}catch(n){}try{l.send(null);
h(l);return true}catch(m){return false}}function d(k){k+="-2";var l=new Image();l.src=k;h(l)}function b(l,m){var k=g(l,m);if(!i||!e(k)){if(window.location.protocol=="https:"){f(k)
}else{d(k)}}}function j(k,l){c=k;i=l!==false}return{init:j,trigger:b,requests:a}}();if(!window.SS){var SS={}}SS.Walmart=function(c){var b="/i/clicktrack.png";c.init(b);
function a(){if(!window.s_products){return}var j=window.s_products.split(",");if(!j.length){return}var f,m,n,k;var l={walmart:0,etplace:0};var e=/^evar30=Walmart.com/;
var h=/^(10569332|10569333|10778775|10783916|10803780|10803781|10884373|10884374|10913073|10913076|10926913|10926914|10926915|10929988|10929990|10929993|10980684|10980685|10993794|10993795|10993799|11019324|11070235|11089881|5623472)$/;
var d=/^(10051208|10196564|10727400|10745665|10745698|10745710|10746133|10746137|10803954|10843058|10877984|11149736|2490141|2676658|5385933|5412495|5420743|5430278|5430279|7964354|7976530|8054497|8112222|8342853|8457890)$/;
for(var g=0;g<j.length;g++){f=j[g].split(";");if(f.length!=6){continue}n=f[0].substr(0,f[0].length-1);if(!l[n]){l[n]=0;l["walmart:"+n]=0;l["etplace:"+n]=0;l["ct:hdtv"]=0;
l["ct:baby"]=0}m=parseFloat(f[3],10);if(isNaN(m)){continue}if(f[5].match(e)){l.walmart+=m;l["walmart:"+n]+=m}else{l.etplace+=m;l["etplace:"+n]+=m}l[n]+=m;
k=f[1];if(k.match(h)){l["ct:hdtv"]+=m}else{if(k.match(d)){l["ct:baby"]+=m}}}for(g in l){if(l[g]>0){c.trigger("purchase:"+g,l[g])}}}return{trackPurchases:a}}(SS.EventTrack);
</script>