//ajax  시작..
function createHttpRequest()
{
	if(window.ActiveXObject){
		 //Win e4,e5,e6용
		try {
			return new ActiveXObject("Msxml2.XMLHTTP") ;
		} catch (e) {
			try {
				return new ActiveXObject("Microsoft.XMLHTTP") ;
			} catch (e2) {
				return null ;
 			}
 		}
	} else if(window.XMLHttpRequest){
		 //Win Mac Linux m1,f1,o8 Mac s1 Linux k3용
		return new XMLHttpRequest() ;
	} else {
		return null ;
	}
}
// 브라우저 판정
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)
}

//아이디 닉네임 체크 페이지 호출및 데이터 받아오기
function checkUid(val,url,type,code)
{
	var bwoj = new chkAjaBrowser();
	var opera	  = bwoj.bw.opera;
	var safari	  = bwoj.bw.safari;
	var konqueror = bwoj.bw.konqueror;
	var mozes	  = bwoj.bw.mozes ;

	var request = createHttpRequest();
	request.open("POST", "ajax_uidCheck.php");
	request.setRequestHeader('Content-Type','application/x-www-form-urlencoded; charset=UTF-8');
	request.send("val="+val+"&url="+url+"&type="+type+"&code="+code);

	if(opera || safari || mozes){
			request.onload = function () { callback(request); }
		} else {

			request.onreadystatechange =function ()
			{
				if ( request.readyState == 4 ){
					callback(request);
				}
			}
		}
}