一段js代码，求解密

var Lat;
var Lng;
var City;
var offsetLat = 0;
var offsetLng = 0;
var gMap;
var wyMap;
window.onload = function()
{
wyMap = new LTMaps("wymap");
gMap = new GMap2(document.getElementById("gmap"));
GetUserInfo()
}
;
function ShowWymap(f, g)
{
wyMap.addControl(new LTStandMapControl());
var h = new LTPoint(parseFloat(Lng) * 100000, parseFloat(Lat) * 100000);
var j = new LTInfoWindow(h);
j.setHeight(12);
if(f != '')j.setTitle('行政地图：' + f);
wyMap.centerAndZoom(h, g);
wyMap.addOverLay(j);
onMapDrag = function()
{
var a = wyMap.getCenterPoint();
Lng = a.getLongitude() / 100000;
Lat = a.getLatitude() / 100000;
ShowGmap('', 17 - wyMap.getCurrentZoom())
}
;
LTEvent.addListener(wyMap, "mouseup", onMapDrag);
LTEvent.addListener(wyMap, "zoom", onMapDrag);
ShowSearch = function()
{
var a = document.getElementById("key").value;
if(a != '' && City != '')
{
var b = new LTLocalSearch(showPoint);
b.setCity(City);
b.search(a)
}
}
;
showPoint = function(a)
{
if(a.searchPoints.length > 0)
{
var b;
var c;
var d;
wyMap.clearOverLays();
var e = [];
b = a.searchPoints[0];
Lat = parseFloat(b.point[1] / 100000);
Lng = parseFloat(b.point[0] / 100000);
ShowGmap(b.name, 13);
ShowWymap(b.name, 4);
for(var i = 0; i < a.count; i ++ )
{
b = a.searchPoints[i];
c = new LTPoint(b.point[0], b.point[1]);
d = new LTMarker(c);
wyMap.addOverLay(d);
d.name = b.name;
LTEvent.bind(d, "click", d, function()
{
this.openInfoWinHtml(this.name)
}
);
e.push(c)
}
}
else alert('没有找到啊!')
}
}
;
function ShowGmap(a, b)
{
if(GBrowserIsCompatible())
{
var c = new GMap2(document.getElementById("gmap"));
c.setCenter(new GLatLng(parseFloat(Lat) - offsetLat, parseFloat(Lng) - offsetLng), b);
c.setMapType(G_SATELLITE_MAP);
c.addControl(new GLargeMapControl());
c.addControl(new GMapTypeControl());
if(a != '')c.openInfoWindow(c.getCenter(), document.createTextNode("卫星定位:" + a + " 北纬:" + Lat + " 东经:" + Lng));
var d = c.getCenter();
GEvent.addListener(c, "click", function()
{
if(d != c.getCenter())
{
d = c.getCenter();
c.openInfoWindow(d, document.createTextNode("此地经纬度：" + d))
}
}
)
}
}
;
function InitAjax()
{
var a = false;
try
{
a = new ActiveXObject("Msxml2.XMLHTTP")
}
catch(e)
{
try
{
a = new ActiveXObject("Microsoft.XMLHTTP")
}
catch(e)
{
a = false
}
}
if( ! a && typeof XMLHttpRequest != 'undefined')
{
a = new XMLHttpRequest()
}
return a
}
;
function GetUserInfo()
{
document.getElementById("scan_ip").focus();
ajax = InitAjax();
ajax.open("GET", "./ajax_ipscan.php?my=ok", true);
ajax.send(null);
ajax.onreadystatechange = function()
{
if(ajax.readyState == 4 && ajax.status == 200 && ajax.responseText.length > 0)
{
var a = document.getElementById("user_info");
var b = ajax.responseText.split('`');
var c = "";
if(b[0] == "0")
{
var c = "";
c = "IP: " + b[1] + " 来自: " + b[2] + " 系统: " + b[3] + " 浏览器: " + b[4] + " 分辨率: " + escape(screen.width + "x" + screen.height);
a.innerHTML = c;
City = b[5];
Lat = b[6];
Lng = b[7];
ShowGmap(City, 13);
ShowWymap(City, 4)
}
}
}
}
;
function GetChengShiInfo()
{
var d = document.getElementById("cheng_shi");
if(d.value.length > 0)
{
var e = d.value.replace(/&/g, "@");
e = e.replace(/`/g, "'");
ajax = InitAjax();
ajax.open("POST", "./ajax_ipscan.php", true);
var f = "cheng_shi=" + e;
ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); ajax.send(f); ajax.onreadystatechange = function()
{
var a = document.getElementById("scan_info");
if(ajax.readyState == 4 && ajax.status == 200 && ajax.responseText.length > 0)
{
var b = "";
var c = ajax.responseText.split('`');
b = "查找城市：" + e + "";
a.innerHTML = b;
City = c[0];
Lat = c[1];
Lng = c[2];
ShowGmap(City, 13);
ShowWymap(City, 4)
}
}
}
else alert('请输入城市名称才能查询！');
d.focus()
}
;
function GetScanInfo()
{
scanIp = document.getElementById("scan_ip");
if(scanIp.value.length > 0)
{
var d = scanIp.value.replace(/&/g, "@");
d = d.replace(/`/g, "'");
ajax = InitAjax();
ajax.open("GET", "./ajax_ipscan.php?ip=" + d, true);
ajax.send(null);
ajax.onreadystatechange = function()
{
var a = document.getElementById("scan_info");
if(ajax.readyState == 4 && ajax.status == 200 && ajax.responseText.length > 0)
{
var b = ajax.responseText.split('`');
var c = "";
if(b[0] == "1")
{
var c = "";
c = "查询结果： IP: " + b[1] + " 地址: " + b[2] + "";
a.innerHTML = c;
City = b[5];
Lat = b[6];
Lng = b[7];
ShowGmap(City, 13);
ShowWymap(City, 4)
}
}
}
}
else alert('请输入IP或域名才能查询！');
scanIp.focus()
}
;

xxx