function chkAjaBrowser(){
	var a,ua = navigator.userAgent;
	this.bw= { 
		safari    : ((a=ua.split('AppleWebKit/')[1])?a.split('(')[0]:0)>=124 ,
		konqueror : ((a=ua.split('Konqueror/')[1])?a.split(';')[0]:0)>=3.3 ,
		mozes     : ((a=ua.split('Gecko/')[1])?a.split(" ")[0]:0) >= 20011128 ,
		opera     : (!!window.opera) && ((typeof XMLHttpRequest)=='function') ,
		msie      : (!!window.ActiveXObject)?(!!createHttpRequest()):false 
	}
	return (this.bw.safari||this.bw.konqueror||this.bw.mozes||this.bw.opera||this.bw.msie)
}
function createHttpRequest(){
	if(window.ActiveXObject){
		try {
			return new ActiveXObject("Msxml2.XMLHTTP") ;
		} catch (e) {
			try {
				return new ActiveXObject("Microsoft.XMLHTTP") ;
			} catch (e2) {
			return null ;
		}
	}
	} else if(window.XMLHttpRequest){
		return new XMLHttpRequest() ;
	} else {
		return null ;
	}
}
function songR(callback,cbdata,url){
songRequest(callback,cbdata,'', 'POST',url,true,true);
}
function songZ(cb,cbd,zl,url){
songRequest(cb,cbd,zl, 'POST',url,true,true);
}
function songRequest(callback,cbdata,data,method,url,async,sload,user,password){
	var oj = createHttpRequest();
	if( oj == null ) return null;
	var sload = (!!songRequest.arguments[6])?sload:false;
	var bwoj = new chkAjaBrowser();
	var opera	  = bwoj.bw.opera;
	var safari	  = bwoj.bw.safari;
	var konqueror = bwoj.bw.konqueror;
	var mozes	  = bwoj.bw.mozes ;
	if(opera || safari || mozes){
		oj.onload = function () { callback(oj,cbdata); }
	} else {
		oj.onreadystatechange =function (){
			if ( oj.readyState == 4 ){
				callback(oj,cbdata);
			}
		}
	}
	if(method.toUpperCase() == 'GET') {
		url += data
	}
	oj.open(method,url,async,user,password);
	setEncHeader(oj)
	oj.send(data);
	function setEncHeader(oj){
		var contentTypeUrlenc = 'application/x-www-form-urlencoded; charset=UTF-8';
		if(!window.opera){
			oj.setRequestHeader('Content-Type',contentTypeUrlenc);
		} else {
			if((typeof oj.setRequestHeader) == 'function')
			oj.setRequestHeader('Content-Type',contentTypeUrlenc);
		}	
		return oj
	}
	return oj
}