function XMLhttp(){
	this.request = null;
	this.time    = null;
	this.t       = null;
	this.last	 = 0;
}

XMLhttp.prototype = {

	init : function(){
		var objXMLHttp = null;
		if(window.XMLHttpRequest){
			objXMLHttp = new XMLHttpRequest();
			if(objXMLHttp.overrideMimeType){
				objXMLHttp.overrideMimeType("text/xml");
			}
		} else if(window.ActiveXObject){
			var MSXML = [
				'MSXML2.XMLHTTP.6.0',
				'MSXML2.XMLHTTP.5.0',
				'MSXML2.XMLHTTP.4.0',
				'MSXML2.XMLHTTP.3.0',
				'MsXML2.XMLHTTP.2.6',
				'MSXML2.XMLHTTP',
				'Microsoft.XMLHTTP.1.0',
				'Microsoft.XMLHTTP.1',
				'Microsoft.XMLHTTP'
			];
			for(var i=0;i<MSXML.length;i++){
				try {
					objXMLHttp = new ActiveXObject(MSXML[i]); break;
				} catch(e){}
			}
		}
		return objXMLHttp;
	},

	send : function(url,data,callback){
		
		if(this.request == null){
			this.request = this.init();
			if(this.request == null){
				window.alert("Can't creat XMLHttpRequest Object.");
				return false;
			}
		}
		var nowtime	= new Date().getTime();
		if(nowtime-this.last<1500){
			clearTimeout(this.t);
			//this.t = setTimeout("ajax.send('"+url+"','"+data+"',"+callback+");",1500+this.last-nowtime);
			this.t = setTimeout("ajax.send('"+url+"','"+data+"',"+callback+");",1);
			return;
		}
		this.last = nowtime;
		url	+= (url.indexOf("?") >= 0) ? "&nowtime=" + nowtime : "?nowtime=" + nowtime;
		if(typeof(data) == 'undefined'){
			this.request.open("GET",url,true);
			this.request.send(null);
		} else{
			this.request.open('POST' , url, true);
			this.request.setRequestHeader("Content-Length",data.length);
			this.request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
			this.request.send(data);
		}
		
		if(typeof(callback) == "function"){
			this.request.onreadystatechange = function(){
				if(ajax.request.readyState == 4){
					if(ajax.request.status == 200 || ajax.request.status == 304){
						callback();
					} else{
						alert("Error loading page\n" + ajax.request.status + ":" + ajax.request.statusText);
					}
				}
			}
		}
	},

	guide : function(){
		var rText = ajax.request.responseText.split('\t');
		var o = ajax.create();
		o.innerHTML  = rText[0];
		o.style.top  = (ietruebody().scrollTop + 170) + 'px';
		o.style.left = (ietruebody().clientWidth - o.offsetWidth)/2 + ietruebody().scrollLeft + 'px';
		ajax.time = setTimeout("ajax.clear();",3000);

		if(typeof(rText[1]) != 'undefined' && in_array(rText[1],['jump','nextto','reload'])){
			if(rText[1]=='jump'){
				setTimeout("window.location.href='"+rText[2]+"';",200);
			} else if(rText[1]=='nextto'){
				sendmsg(rText[2],rText[3],rText[4]);
			} else if(rText[1]=='reload'){
				setTimeout("window.location.reload();",200);
			}
		}
		
	},

	clear : function(){
		document.body.removeChild(getObj('ajax_guide'));
	},

	create : function(){
		if(!IsElement('ajax_guide')){
			var o = document.createElement('div');
			o.style.cssText = 'border:#EFEF9D 1px solid;background:url(images/important.gif) no-repeat .5em center #FFFFD8;font:bold 14px Helvetica;text-align:center;padding:1em 1.5em 1em 4.5em;position:absolute;z-index:3005;';
			o.id  = 'ajax_guide';
			document.body.appendChild(o);
			
		} else{
			clearTimeout(ajax.time);
			var o = getObj('ajax_guide');
		}
		
		return o;
	},

	convert : function(str){
		f = new Array(/\r?\n/g, /\+/g, /\&/g);
		r = new Array('%0A', '%2B', '%26');
		for(var i = 0;i<f.length;i++){
			str = str.replace(f[i], r[i]);
		}
		return str;
	}
}

var ajax = new XMLhttp();

function PwMenu(){
	this.pid  = null;
	this.obj  = null;
	this.w	  = null;
	this.w	  = null;
}

PwMenu.prototype = {

	get : function(){
		if(ajax.request.responseText.indexOf('<') != -1){
			getObj("showmenu").innerHTML = ajax.request.responseText;
			getObj("showmenu").className = 'menu';
			menupz(read.obj,1);
		} else{
			read.close();
			ajax.guide();
		}
	},

	guide : function(){
		getObj("showmenu").innerHTML = '<div style="padding:13px 30px"><img src="'+imgpath+'/loading.gif" align="absbottom" /> 正在加载数据...</div>';
		getObj("showmenu").className = 'menu';
		menupz(read.obj,1);
	},

	close : function(){
		closep();
	},

	submit : function(obj,recall){
		if(typeof recall == 'undefined' || typeof recall != 'function'){
			recall = ajax.guide;
		}
		var d = '';
		var o = obj.elements;
		for(var i=0;i<o.length;i++){
			if(o[i].name && (o[i].type != 'radio' && o[i].type != 'checkbox' || o[i].checked === true))
				d += "&" + o[i].name + "=" + ajax.convert(o[i].value);
		}
		ajax.send(obj.action,d,recall);
		read.close();
	},

	move : function(e){
		if(is_ie){
			document.body.onselectstart = function(){return false;}
		}
		var e  = is_ie ? window.event : e;
		var o  = getObj("showmenu");
		var x  = e.clientX;
		var y  = e.clientY;
		read.w = e.clientX - parseInt(o.offsetLeft);
		read.h = e.clientY - parseInt(o.offsetTop);
		document.onmousemove = read.moving;
		document.onmouseup   = read.moved;
	},

	moving : function(e){
		var e  = is_ie ? window.event : e;
		var x  = e.clientX;
		var y  = e.clientY;
		var o  = getObj("showmenu");
		o.style.left = x - read.w + 'px';
		o.style.top  = y - read.h + 'px';
	},

	moved : function(){
		if(is_ie){
			document.body.onselectstart = function(){return true;}
		}
		document.onmousemove = '';
		document.onmouseup   = '';
	}
}

var read = new PwMenu();

function sendmsg(url,data,id){
	read.obj = getObj(id);
	read.guide();
	setTimeout("ajax.send('"+url+"','"+data+"',"+read.get+");",300);
}
function getObj(id){
	return document.getElementById(id);
}
function IsElement(id){
	return document.getElementById(id)!=null ? true : false;
}
function ietruebody(){
	return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body;
}