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 sendRequest(callback,data,url,target)
{
	var oj = createHttpRequest();
	if( oj == null ) return null;
	url += "?t=" + (new Date()).getTime();
	
	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, target); }
	} else {
	
		oj.onreadystatechange =function () 
		{
			if ( oj.readyState == 4 ){
				callback(oj, target);
			}
		}
	}
	data = uriEncode(data)
	oj.open("POST", url, true);
	setEncHeader(oj);
	oj.send(data);

	function uriEncode(data){
		if(data!=""){
			var encdata = '';
			var datas = data.split('&');
			for(i=1;i<datas.length;i++) {
				var dataq = datas[i].split('=');
				encdata += '&'+encodeURIComponent(dataq[0])+'='+encodeURIComponent(dataq[1]);
			}
		} else {
			encdata = "";
		}
		return encdata;
	}
	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
}