/*
	[Discuz!] (C)2001-2007 Comsenz Inc.
	This is NOT a freeware, use is subject to license terms

	$RCSfile: ajax.js,v $
	$Revision: 1.17.2.25 $
	$Date: 2007/03/21 15:53:02 $
*/
var xml_http_building_link = '请等待，正在建立连接...';
var xml_http_sending = '请等待，正在发送数据...';
var xml_http_loading = '请等待，正在接受数据...';
var xml_http_load_failed = '通信失败，请刷新重新尝试';
var xml_http_data_in_processed = '通信成功，数据正在处理中...';
var statusId_state=null;
var recvType_state=null;

var Ajaxs = new Array();
function Ajax(recvType, statusId) {
	var aj = new Object();
	var xmlPool=[];
	aj.statusId = statusId ? document.getElementById(statusId) : null;
	if(statusId)
	{
	    aj.statusId=document.getElementById(statusId);
	    statusId_state=aj.statusId;  
	}	
	aj.targetUrl = '';
	aj.sendString = '';
	aj.recvType = recvType ? recvType : 'XML';
	aj.resultHandle = null;

//建立一个XMLHttpRequest对象，无论是什么浏览器都能通用了。调用的时候是一个函数Ajax，有两个传入函数recvType和statusId，recvType是ajax返回值的接受类型，有HTML和XML两种类型，Dz一般用的是XML类型；statusID这个是用来指示状态的div
	aj.createXMLHttpRequest = function() {
		var request = false;
		var i,j,tmpObj;
		for(i=0,j=xmlPool.length;i<j;i++)
		{ 
		    if(xmlPool[i].readyState==0 || xmlPool[i].readyState==4)
		    { 		        
		        return xmlPool[i];
		    }
		}
		if(window.XMLHttpRequest) {
			request = new XMLHttpRequest();
			if(request.overrideMimeType) 
			{
				request.overrideMimeType('text/xml');
			}
		} 
		else if(window.ActiveXObject) 
		{
			var versions = ['Microsoft.XMLHTTP','MSXML.XMLHTTP','Microsoft.XMLHTTP','Msxml2.XMLHTTP.7.0','Msxml2.XMLHTTP.6.0','Msxml2.XMLHTTP.5.0','Msxml2.XMLHTTP.4.0','MSXML2.XMLHTTP.3.0','MSXML2.XMLHTTP'];
			for(var i=0; i<versions.length; i++) 
			{
				try
				{
					request = new ActiveXObject(versions[i]);
					break;
//					if(request)
//					{
//						return request;
//					}
				} 
				catch(e) 
				{
				    continue;
					//alert(e.message);
				}
			}
		}
		if(request)
		{ 
		    xmlPool[xmlPool.length]=request;
		    request=null;
		    CollectGarbage();
		    return xmlPool[xmlPool.length-1]; 
		}
		else
		{
		    return false;
		}
//		return request;
	}

//	aj.XMLHttpRequest = aj.createXMLHttpRequest();

//Ajax实例化后的对象aj的processHandle方法，作用当然就是处理ajax请求过程的函数。
//最重要的，当XMLHttpRequest.status=200的时候，那么就表示请求成功并返回了东西，这个时候就用resultHandle这个函数对返回的东西进行处理，可以看到还是分为HTML和XML两种情况分别调用不同的方法，一个是responsText一个是responseXML。
	aj.processHandle = function() {
		if(aj.statusId) {
			aj.statusId.style.display = '';
		}
		if(aj.XMLHttpRequest.readyState == 1 && aj.statusId) {
			aj.statusId.innerHTML = xml_http_building_link;
		} else if(aj.XMLHttpRequest.readyState == 2 && aj.statusId) {
			aj.statusId.innerHTML = xml_http_sending;
		} else if(aj.XMLHttpRequest.readyState == 3 && aj.statusId) {
			aj.statusId.innerHTML = xml_http_loading;
		} else if(aj.XMLHttpRequest.readyState == 4) {
			if(aj.XMLHttpRequest.status == 200) {
				for(k in Ajaxs) {
					if(Ajaxs[k] == aj.targetUrl) {
						Ajaxs[k] = null;
					}
				}

				if(aj.statusId) {
					aj.statusId.innerHTML = xml_http_data_in_processed;
					aj.statusId.style.display = 'none';
				}
				if(aj.recvType == 'HTML') {
					aj.resultHandle(aj.XMLHttpRequest.responseText, aj);
				} else if(aj.recvType == 'XML') {
				    try
				    {
//					aj.resultHandle(aj.XMLHttpRequest.responseXML.firstChild.data, aj);.getElementsByTagName('data').item(0);
                    aj.resultHandle(aj.XMLHttpRequest.responseXML,aj);
					}catch(err){
					    sAlert(err.description,this);
				    }
				}
			} else {
				if(aj.statusId) {
				alert(aj.XMLHttpRequest.responseText); 
					aj.statusId.innerHTML = xml_http_load_failed;
				}
			}
		}
	}
	//这里是ajax的两个方法，一个是get,用来提交get数据的，比方说discuz对于注册的时候ajax的表情显示就是get方法；另外一个是post，用来提交post数据。targetUrl, resultHandle这两个参数分别是要请求的地址和处理函数
	aj.get = function(targetUrl, resultHandle) {
		if(in_array(targetUrl, Ajaxs)) {
			return false;
		} else {
			arraypush(Ajaxs, targetUrl);
		}
		aj.targetUrl = targetUrl;
		aj.XMLHttpRequest = aj.createXMLHttpRequest();
		aj.XMLHttpRequest.onreadystatechange = aj.processHandle;
		aj.resultHandle = resultHandle;
		if(window.XMLHttpRequest) {
			aj.XMLHttpRequest.open('GET', aj.targetUrl);
			aj.XMLHttpRequest.send(null);
		} else {
		        aj.XMLHttpRequest.open("GET", targetUrl, true);
		        aj.XMLHttpRequest.send();
		}		
	}

	aj.post = function(targetUrl, sendString, resultHandle) 
	{
//	    try
//	    {
		    if(in_array(targetUrl, Ajaxs)) {
			    return false;
		    } else {
			    arraypush(Ajaxs, targetUrl);
		    }	
		    aj.targetUrl = targetUrl;
		    aj.sendString = sendString;
		    aj.XMLHttpRequest = aj.createXMLHttpRequest();
		    aj.XMLHttpRequest.onreadystatechange = aj.processHandle;
		    aj.resultHandle = resultHandle;
		    aj.XMLHttpRequest.open('POST', targetUrl,true);
		    aj.XMLHttpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		    aj.XMLHttpRequest.setRequestHeader("Cache-Control","no-cache"); 
		    aj.XMLHttpRequest.send(aj.sendString);
//		}catch(err)
//		{			
//			this.onerror.call(this);
//		}
	}	
	return aj;
}
function getXMLDocument()
{
    var xDoc = null;
    if(document.implementation && document.implementation.createDocument)
    {
	    xDoc = document.implementation.createDocument("","",null);
	    return xDoc;
    }
    else if(typeof ActiveXObject != "undefined")
    {
	    var arrSignatures=["Msxml.DOMDocument.5.0","Msxml.DOMDocument.4.0","Msxml.DOMDocument.3.0","Msxml.DOMDocument","Microsoft.XMLDOM"];
	    for(var i=0;i<arrSignatures.length;i++)    
	    {
	        try
	        {
		        xDoc = new ActiveXObject(arrSignatures[i]);
		        xDoc.async ="false";
		        return xDoc;
	        }
	        catch(oError)
	        {
	            xDoc=null;		        
	        }
	    }
	    return xDoc;	    
    }	    
}
function arraypush(thearray,value) 
{
      thearraysize = getarraysize(thearray);
      thearray[thearraysize] = value;
      return thearray[thearraysize];
}
function getarraysize(thearray) 
{
        for (i = 0; i < thearray.length; i++) {
                if ((thearray[i] == "undefined") || (thearray[i] == "") || (thearray[i] == null))
                        return i;
                }
        return thearray.length;
}
function in_array(stringToSearch, arrayToSearch) {
    for (s = 0; s <arrayToSearch.length; s++) {
        var thisEntry = arrayToSearch[s];
        if (thisEntry == stringToSearch) {
            return true;
        }
    }
    return false;
} 

//example
function updatesecqaa() {
	var x = new Ajax();
	x.get('ajax.aspx?action=updatesecqaa&inajax=1', function(s) {
		$('secquestion').innerHTML = s;
	});
}


function ignorepm(e) {
	var x = new Ajax();
	x.get('pm.aspx?action=noprompt&inajax=1', function(s) {
		$('pmprompt').style.display = 'none';
	});
	doane(e);
}

function adnum(aid)
{
//	alert(aid);
	
	var x = new Ajax();
	x.get('./AdvertHelp.ashx?action=adnum&id='+aid+'&time='+(new Date()).getTime(), function(s) {
		//$('secquestion').innerHTML = s;
	});
}
function SubVote(checkvale)
{
    if(checkvale!="")
    {
	    var x = new Ajax();
	    x.get('./AdvertHelp.ashx?action=Vote&id='+checkvale+'&time='+(new Date()).getTime(), function(s) {
		    //$('secquestion').innerHTML = s;
		    //alert("投票成功！");
	    });
	}
}