if (typeof(COMMON_CH) == 'undefined') { // 한번만 실행
    var COMMON_CH = true;

	function getXMLHttpRequest()
	{
		if (window.ActiveXObject)
		{
			try {
				return new ActiveXObject("Msxml2.XMLHTTP");
			} catch(e) {
				try {
					return new ActiveXObject("Microsoft.XMLHTTP");
				} catch(e1) { return null; }
			}
		} else if (window.XMLHttpRequest) {
			return new XMLHttpRequest();
		} else {
			return null;
		}
	}

	function callFiles(Url,Params,Span)
	{
			httpRequest = getXMLHttpRequest();
			httpRequest.open("post", Url,false);
			httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			httpRequest.send(Params);

			if (httpRequest.readyState == 4 && httpRequest.status == 200) {
					if(Span){
						if(Span=="wr_subject")
							document.getElementById(Span).value=httpRequest.responseText;
						else
							document.getElementById(Span).innerHTML=httpRequest.responseText;
					}
			} else {
					alert("실패: "+httpRequest.status);
			}
	}
}