function AJAX_UpdatePage( str, updateArea, updateOptionFlag ){

	var result = document.getElementById( updateArea );

	if ( updateOptionFlag == "C_LIST_APPEND" ) 
	{					 
		result.removeChild(document.getElementById('listItemMore'));
		result.innerHTML += str;
	} 
	else if ( updateOptionFlag == "C_OVERWRITE_AREA" ) 
	{ 
		result.innerHTML = str;		
		myScroll.scrollTo(0, 0, "0");			
	} 
	else 
	{
		result.innerHTML = str;
		myScroll.scrollTo(0, 0, "0");
	}
	myScroll.refresh();
	AJAX_requestFlag = false;
}

function AJAX_Get_xmlHttpReq()
{
	var xmlhttp = null;
	
	if (window.XMLHttpRequest)
	{// code for IE7+, Firefox, Chrome, Opera, Safari
		xmlhttp=new XMLHttpRequest();
	}
	else
	{// code for IE6, IE5
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	return xmlhttp; 
}

function AJAX_DataRequest( strURL, querystring, updateArea, updateOptionFlag )
{
	var xmlHttpReq = false;
    var self = this;

    self.xmlHttpReq = AJAX_Get_xmlHttpReq();

    self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {        
        if(self.xmlHttpReq.readyState == 0) {   // ���� �ʱ�ȭ �ȵ�
        }else if(self.xmlHttpReq.readyState == 1) {  // �д� ��
        }else if(self.xmlHttpReq.readyState == 2) {  // �б� �Ϸ�
        }else if(self.xmlHttpReq.readyState == 3) {  // �۾� ��
        }else if(self.xmlHttpReq.readyState == 4) { // �۾�Ϸ�
        	AJAX_UpdatePage( self.xmlHttpReq.responseText, updateArea, updateOptionFlag );
        }
    };
    self.xmlHttpReq.send( querystring );					    	    												
}


function ajaxGetDataString()
{	
	var args = this.ajaxGetDataString.arguments;
	//args length 1�� =args[0]:�Ķ����	
	//args length 2�� =args[0]:�Ķ����, args[1]:(���� ��޺���=> ex.append/overwrite)
	//args length 3�� =args[0]:�Ķ����, args[1]:(���� ��޺���=> ex.append/overwrite), args[2]:actionName

	var xmlHttpReq = false;
    var self = this;

    self.xmlHttpReq = AJAX_Get_xmlHttpReq();
    
    if(args.length==1 || args.length==2){
    	self.xmlHttpReq.open('POST', "/LIBROPIA/libropia.do", true);
    }else if(args.length==3){
    	self.xmlHttpReq.open('POST', args[2], true);
    }
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {        
        if(self.xmlHttpReq.readyState == 0) {   // ���� �ʱ�ȭ �ȵ�
        }else if(self.xmlHttpReq.readyState == 1) {  // �д� ��
        }else if(self.xmlHttpReq.readyState == 2) {  // �б� �Ϸ�
        }else if(self.xmlHttpReq.readyState == 3) {  // �۾� ��
        }else if(self.xmlHttpReq.readyState == 4) { // �۾�Ϸ�
        	//alert(self.xmlHttpReq.responseText);    
        	if(args.length==1){
        		getXmlResult(self.xmlHttpReq.responseText);
        	}else{
        		getXmlResult(self.xmlHttpReq.responseText, args[1] );
        	}
        }
    };
    self.xmlHttpReq.send( args[0] );    
}

function AJAX_xmlhttpPost(URL) {
	var xmlhttp = null;

	xmlhttp = AJAX_Get_xmlHttpReq();

	xmlhttp.open('GET', URL,false);
	xmlhttp.onreadystatechange = function() {
		if(xmlhttp.readyState==4 && xmlhttp.status == 200 && xmlhttp.statusText=='OK') {
			responseText = xmlhttp.responseText;
		}
	};
	xmlhttp.send('');
	return responseText = xmlhttp.responseText;
}


function AJAX_DataRequest_UserFun( strURL, querystring, updateUserFun )
{
	var xmlHttpReq = false;
    var self = this;

    self.xmlHttpReq = AJAX_Get_xmlHttpReq();

    self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {        
    	//alert(self.xmlHttpReq.readyState);
        if(self.xmlHttpReq.readyState == 0) {   // ���� �ʱ�ȭ �ȵ�
        }else if(self.xmlHttpReq.readyState == 1) {  // �д� ��
        }else if(self.xmlHttpReq.readyState == 2) {  // �б� �Ϸ�
        }else if(self.xmlHttpReq.readyState == 3) {  // �۾� ��
        }else if(self.xmlHttpReq.readyState == 4) { // �۾�Ϸ�
        	if(updateUserFun)
        	{(updateUserFun)( self.xmlHttpReq.responseText );}
        }
    };
    self.xmlHttpReq.send( querystring );					    	    												
}

function AJAX_DataRequest_GET( strURL, querystring, updateUserFun )
{
	var xmlHttpReq = false;
    var self = this;

    self.xmlHttpReq = AJAX_Get_xmlHttpReq();

    self.xmlHttpReq.open('GET', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {        
    	//alert(self.xmlHttpReq.readyState);
        if(self.xmlHttpReq.readyState == 0) {   // ���� �ʱ�ȭ �ȵ�
        }else if(self.xmlHttpReq.readyState == 1) {  // �д� ��
        }else if(self.xmlHttpReq.readyState == 2) {  // �б� �Ϸ�
        }else if(self.xmlHttpReq.readyState == 3) {  // �۾� ��
        }else if(self.xmlHttpReq.readyState == 4) { // �۾�Ϸ�
        	if(updateUserFun)
        	{(updateUserFun)( self.xmlHttpReq.responseText );}
        }
    };
    self.xmlHttpReq.send( querystring );					    	    												
}




function loadXMLDoc(url,cfunc)
{
	var xmlhttp = null;
	
	xmlhttp = AJAX_Get_xmlHttpReq();
	
	xmlhttp.onreadystatechange=cfunc;
	xmlhttp.open("GET",url,true);
	xmlhttp.send();
}

//function myFunction()
//{
//	loadXMLDoc("ajax_info.txt",function()
//  	{
//  		if (xmlhttp.readyState==4 && xmlhttp.status==200)
//    		{
//    			document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
//    		}
//  	}
//);
//<div id="myDiv"><h2>Let AJAX change this text</h2></div>
//<button type="button" onclick="myFunction()">Change Content</button>