$= document.getElementById;
//禁止右键
/*function Click(){
	window.event.returnValue=false;
}
document.oncontextmenu=Click;*/
////弹出窗口居中
function openwindow(url,name,iWidth,iHeight){
  var url;                           //转向网页的地址;
  var name;                           //网页名称，可为空;
  var iWidth;                          //弹出窗口的宽度;
  var iHeight;                        //弹出窗口的高度;
  var iTop = (window.screen.availHeight-30-iHeight)/2;       //获得窗口的垂直位置;
  var iLeft = (window.screen.availWidth-10-iWidth)/2;           //获得窗口的水平位置;
  window.open(url,name,'height='+iHeight+',,innerHeight='+iHeight+',width='+iWidth+',innerWidth='+iWidth+',top='+iTop+',left='+iLeft+',toolbar=no,menubar=no,scrollbars=auto,resizeable=no,location=no,status=no');
}

var xmlHttp = {
    _objPool: [],

    _getInstance: function (){
        for (var i = 0; i < this._objPool.length; i ++){
            if (this._objPool[i].readyState == 0 || this._objPool[i].readyState == 4){
                return this._objPool[i];
            }
        }
        // IE5中不支持push方法
        this._objPool[this._objPool.length] = this._createObj();
        return this._objPool[this._objPool.length - 1];
    },

    _createObj: function (){
        if (window.XMLHttpRequest){
            var objXMLHttp = new XMLHttpRequest();
        }else{
            var MSXML = ['MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP'];
            for(var n=0; n<MSXML.length; n++){
                try{
                    var objXMLHttp = new ActiveXObject(MSXML[n]);
                    break;
                }catch(e){}
            }
        }          
        // mozilla某些版本没有readyState属性
        if (objXMLHttp.readyState == null){
            objXMLHttp.readyState = 0;
            objXMLHttp.addEventListener("load", function (){
                objXMLHttp.readyState = 4;
                if(typeof objXMLHttp.onreadystatechange == "function"){objXMLHttp.onreadystatechange();}
            },  false);
        }
        return objXMLHttp;
    },

    // 发送请求(方法[post,get], 地址, 数据, 回调函数)
    sendReq: function (method, url, data, callback){
        var objXMLHttp = this._getInstance();
        with(objXMLHttp){
            try{
                // 加随机数防止缓存
                if (url.indexOf("?") > 0){url += "&randnum=" + Math.random();}
                else{url += "?randnum=" + Math.random();}
                open(method, url, true);
                // 设定请求编码方式
                setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
                send(data);
                onreadystatechange = function (){
                    if (objXMLHttp.readyState == 4 && (objXMLHttp.status == 200 || objXMLHttp.status == 304)){
                        callback(objXMLHttp);
                    }
                }
            }catch(e){alert(e);}
        }
    }
}


//Flash 
function LoadFlash(url,wmode,width,Height){    document.write(    '<embed src="' + url + '" wmode=' + wmode +    ' quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="' + width +     '" height="' + Height + '" menu="false"></embed>');    }
//////////////////////////////////////////////////////////
function AddFavorite() {
	var sURL = "http://www.fountainschool.com/";
	var sTitle = "Fountainschool International Education Inc.";
	try {
		window.external.addFavorite(sURL, sTitle);
	} catch (e) {
		try {
			window.sidebar.addPanel(sTitle, sURL, "");
		} catch (e) {
			alert("加入收藏失败，请使用Ctrl+D进行添加");
		}
	}
}

//////////////////////////

//跳转页面代码////////////
function MM_jumpMenu(targ, selObj, restore) {
	//v3.0
	eval(targ+".location='?page="+selObj.options[selObj.selectedIndex].value+"'");
	if (restore) {
		selObj.selectedIndex = 0;
	}
}


function turnoff(target){
	if (document.getElementById(target)){
		if(document.getElementById(target).style.display=="none"){
			document.getElementById(target).style.display="block";
		}else{
			document.getElementById(target).style.display="none";
		}
	}
}
function leftMenuType(target){
	if(document.getElementById(target).style.display=="none"){
		document.getElementById(target).style.display="block";
		document.getElementById(target).className="on"
	}else{
		document.getElementById(target).style.display="none";
	}
}
/////////////////////

//连接动态文件////////////////////
/*var xmlHttp;
function createXMLHttpRequest() {
	try {
		xmlHttp = new xmlHttpRequest();
	} catch (trymicrosoft) {
		try {
			xmlHttp = new ActiveXObject("Msxml2.xmlHttp");
		} catch (othermicrosoft) {
			try {
				xmlHttp = new ActiveXObject("Microsoft.xmlHttp");
			} catch (failed) {
				alert("你的浏览器不支持xmlHttpRequest对象，请升级");
			}
		}
	}
	return xmlHttp;
}*/
function startRequest(url,returnfun) {
   createXMLHttpRequest(); 
   var time = new Date().getTime();
   xmlHttp.onreadystatechange =returnfun;
   xmlHttp.open("GET",url+"&time="+time,true);
   xmlHttp.send(null);    
}