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;
	}
}

var httpRequest = null;

function sendRequest(url, params, callback, method){
	httpRequest = getXMLHttpRequest();
	var httpMethod = method ? method : 'GET';
	if(httpMethod != 'GET' && httpMethod != 'POST'){
		httpMethod = 'GET';
	}
	
	if(params == null || params == ''){
		var httpParams = null;
	}else{
		var httpParams = params;
	}
	
	var httpUrl = url;
	
	if(httpMethod == 'GET' && httpParams != null){
		httpUrl = httpUrl + "?" + httpParams;
	}
	
	httpRequest.open(httpMethod, httpUrl, true);
	httpRequest.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
	httpRequest.setRequestHeader('Content-type', 'text/html; charset=euc_kr'); 
	httpRequest.setRequestHeader('Accept-Language', 'ko'); 
	
	httpRequest.onreadystatechange = callback;
	httpRequest.send(httpMethod == 'POST' ? httpParams : null);
}