var Request = new function(){

this.pool = new Array();

this.getXMLHttp = function (chunnel)
{
	
 if(chunnel != null)
 {
  for (var a = 0; a < this.pool.length; a++)
  {
   if(this.pool[a]["chunnel"] == chunnel)
   {
	if(this.pool[a]["obj"].readyState == 0 || this.pool[a]["obj"].readyState == 4)
    {
     return this.pool[a]["obj"];
    }
	else 
	{
      return "busy";
	}
   }
  }
  
  this.pool[this.pool.length] = new Array();
  this.pool[this.pool.length - 1]["obj"] = this.createXMLHttp();
  this.pool[this.pool.length - 1]["chunnel"] = chunnel;
  return this.pool[this.pool.length - 1]["obj"];
 
 }
	
 for (var i = 0; i < this.pool.length; i++)
 {
  if (this.pool[i]["obj"].readyState == 0 || this.pool[i]["obj"].readyState == 4)
  {
   return this.pool[i]["obj"];
  }
 }
 
 this.pool[this.pool.length] = new Array();
 this.pool[this.pool.length - 1]["obj"] = this.createXMLHttp();
 this.pool[this.pool.length - 1]["chunnel"] = "";
 return this.pool[this.pool.length - 1]["obj"];

}

this.createXMLHttp = function ()
{
 
 if(window.XMLHttpRequest)
 {
  var xmlObj = new XMLHttpRequest();
 } 
 else 
 {
  var MSXML = ['Microsoft.XMLHTTP', 'MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];
  for(var n = 0; n < MSXML.length; n++)
  {
   try
   {
    var xmlObj = new ActiveXObject(MSXML[n]);        
    break;
   }
   catch(e)
   {
   }
  }
 } 
 
 return xmlObj;

}

this.reSend = function (url,data,callback,chunnel)
{
 var objXMLHttp = this.getXMLHttp(chunnel)
 
 if(typeof(objXMLHttp) != "object")
 {
   return ;
 }
 
 url += (url.indexOf("?") >= 0) ? "&nowtime=" + new Date().getTime() : "?nowtime=" + new Date().getTime();

 if(data == "")
 {
  objXMLHttp.open('GET' , url, true);
  objXMLHttp.send('');
 }
 else 
 { 
  objXMLHttp.open('POST' , url, true);
  objXMLHttp.setRequestHeader("Content-Length",data.length); 
  objXMLHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
  objXMLHttp.send(data);
 }
 
 if(typeof(callback) == "function" )
 {
  objXMLHttp.onreadystatechange = function ()
  {
   if (objXMLHttp.readyState == 4)
   {
    if(objXMLHttp.status == 200 || objXMLHttp.status == 304)
    {
     callback(objXMLHttp) 
    }
    else
    {
     alert("Error loading page\n"+ objXMLHttp.status +":"+ objXMLHttp.statusText);
    }
   }
  }
 }

}

}

var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

var base64DecodeChars = new Array(

-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,

52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,

-1,0,1,2,3,  4,5,6,7,8,9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,

-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,

41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);

function base64encode(str) {

var out, i, len;

var c1, c2, c3;

len = str.length;

i = 0;

out = "";

while(i < len) {

 c1 = str.charCodeAt(i++) & 0xff;

 if(i == len)

 {

 out += base64EncodeChars.charAt(c1 >> 2);

 out += base64EncodeChars.charAt((c1 & 0x3) << 4);

 out += "==";

 break;

 }

 c2 = str.charCodeAt(i++);

 if(i == len)

 {

 out += base64EncodeChars.charAt(c1 >> 2);

 out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));

 out += base64EncodeChars.charAt((c2 & 0xF) << 2);

 out += "=";

 break;

 }

 c3 = str.charCodeAt(i++);

 out += base64EncodeChars.charAt(c1 >> 2);

 out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));

 out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));

 out += base64EncodeChars.charAt(c3 & 0x3F);

}

return out;

}

function base64decode(str) {

var c1, c2, c3, c4;

var i, len, out;

len = str.length;

i = 0;

out = "";

while(i < len) {

 /* c1 */

 do {

 c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];

 } while(i < len && c1 == -1);

 if(c1 == -1)

 break;

 /* c2 */

 do {

 c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];

 } while(i < len && c2 == -1);

 if(c2 == -1)

 break;

 out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));

 /* c3 */

 do {

 c3 = str.charCodeAt(i++) & 0xff;

 if(c3 == 61)

return out;

 c3 = base64DecodeChars[c3];

 } while(i < len && c3 == -1);

 if(c3 == -1)

 break;

 out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));

 /* c4 */

 do {

 c4 = str.charCodeAt(i++) & 0xff;

 if(c4 == 61)

return out;

 c4 = base64DecodeChars[c4];

 } while(i < len && c4 == -1);

 if(c4 == -1)

 break;

 out += String.fromCharCode(((c3 & 0x03) << 6) | c4);

}

return out;

}

function utf16to8(str) {

var out, i, len, c;

out = "";

len = str.length;

for(i = 0; i < len; i++) {

 c = str.charCodeAt(i);

 if ((c >= 0x0001) && (c <= 0x007F)) {

 out += str.charAt(i);

 } else if (c > 0x07FF) {

 out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));

 out += String.fromCharCode(0x80 | ((c >>6) & 0x3F));

 out += String.fromCharCode(0x80 | ((c >>0) & 0x3F));

 } else {

 out += String.fromCharCode(0xC0 | ((c >>6) & 0x1F));

 out += String.fromCharCode(0x80 | ((c >>0) & 0x3F));

 }

}

return out;

}

function utf8to16(str) {

var out, i, len, c;

var char2, char3;

out = "";

len = str.length;

i = 0;

while(i < len) {

 c = str.charCodeAt(i++);

 switch(c >> 4)

 {

 case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:

 // 0xxxxxxx

 out += str.charAt(i-1);

 break;

 case 12: case 13:

 // 110x xxxx 10xx xxxx

 char2 = str.charCodeAt(i++);

 out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));

 break;

 case 14:

 // 1110 xxxx10xx xxxx10xx xxxx

 char2 = str.charCodeAt(i++);

 char3 = str.charCodeAt(i++);

 out += String.fromCharCode(((c & 0x0F) << 12) |

((char2 & 0x3F) << 6) |

((char3 & 0x3F) << 0));

 break;

 }

}

return out;

}