ajax.js

我写的一个小偷模块 非常实用 内有详细说明

// JScript 文件

function $n()
{
     var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementsByName(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }

  return elements;
}
function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }

  return elements;
}

String.prototype.trim=function()
{
    return this.replace(/(^\s*)|(\s*$)/g, "");
}
var Request = new Object();
Request.reqList = [];


function getAjax(){
    var ajax=false; 
    try { 
     ajax = new ActiveXObject("Msxml2.XMLHTTP"); 
    } catch (e) { 
      try { 
      ajax = new ActiveXObject("Microsoft.XMLHTTP"); 
     } catch (E) { 
      ajax = false; 
     } 
    }
    if (!ajax && typeof XMLHttpRequest!='undefined') { 
     ajax = new XMLHttpRequest(); 
    }
    
    return ajax;
}
Request.send = function(url, method, callback, data, urlencoded, callback2,load) {
   
    var req=getAjax(); 
	req.onreadystatechange = function() {
		if (req.readyState == 4) {
			if (req.status < 400) {
			if(callback)
			{
				(method=="POST") ? callback(req,data) : callback(req,data);
			}	
			} else {
			alert(url);
			alert("There was a problem loading data :\n" + req.status+ "/" + req.statusText);
				if (callback2) {
				callback2(req,data);
				}
				
			
			}
			try {
				delete req;
				req = null;
			} catch (e) {}
		}
	}

	if (method=="POST") {
		req.open("POST", url, true);
		if (urlencoded) 
		    req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');		
		req.send(data);
		
		Request.reqList.push(req);
	} else {
		req.open("GET", url, true);
		req.send(null);

		Request.reqList.push(req);
	}
	if(!load)
	{
	    loading();	
	}
	return req;
}

Request.clearReqList = function() {
	var ln = Request.reqList.length;
	for (var i=0; i<ln; i++) {
		var req = Request.reqList[i];
		if (req) {
		try {
			//req.close();
			delete req;
		} catch(e) {}
		}
	}
	Request.reqList = [];
}

Request.sendPOST = function(url, data, callback, clear, callback2,load) {
	if (clear)
		Request.clearReqList();
	Request.send(url, "POST", callback, data, true, callback2,load);
}

Request.sendGET = function(url, callback, args, clear, callback2,load) {
	if (clear)
		Request.clearReqList();
	return Request.send(url, "GET", callback, args, false, callback2,load);
}
function loading()
{
if($("result"))
$("result").innerText="正在查询,请稍候...........";
else if($("content"))
$("content").innerText="正在查询,请稍候...........";
}