/*
' 소스설명 : ajax용 클래스
*/


var ajax = {};
ajax.xhr = {};

ajax.xhr.Request = function(url, params, callback, method) {
  this.url = url;
  this.params = params;
  this.callback = callback;
  this.method = method;
  this.send();
}


ajax.xhr.Request.prototype = {
  
  getXMLHttpRequest: function() {	  
	  
	  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;
	  }		
  },

  send: function() {

	  this.req = this.getXMLHttpRequest();
		
	  var httpMethod = this.method ? this.method : 'GET';
	  if (httpMethod != 'GET' && httpMethod != 'POST') {
			httpMethod = 'GET';
	  }
	  
	  var httpParams = (this.params == null || this.params == '') ? null : this.params;
	  var httpUrl = this.url;
	  if (httpMethod == 'GET' && httpParams != null) {
			httpUrl = httpUrl + "?" + httpParams;
	  }
	  this.req.open(httpMethod, httpUrl, true);
	  this.req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	  var request = this;
	  this.req.onreadystatechange = function() {
		  request.onStateChange.call(request);
	  }
  	  this.req.send(httpMethod == 'POST' ? httpParams : null);
  },
  
  onStateChange: function() {
	  this.callback(this.req);
  }

}




ajax.Event = {};
ajax.Event.addListener = function(element, name, observer, useCapture) {

  useCapture = useCapture || false;

  if (element.addEventListener) {
		element.addEventListener(name, observer, useCapture);
  }
  else if (element.attachEvent) {
		element.attachEvent('on' + name, observer);
  }

}


ajax.Event.removeListener = function(element, name, observer, useCapture) {
  
  useCapture = useCapture || false;
	
  if (element.removeEventListener) {
		element.removeEventListener(name, observer, useCapture);
  }
  else if (element.detachEvent) {
		element.detachEvent('on' + name, observer);
  }

}


ajax.Event.getTarget = function(event) {
  
  if (event == null) return null;
  if (event.target) return event.target;
  else if (event.srcElement) return event.srcElement;
  
  return null;
}


ajax.Event.getMouseXY = function(event) {
  
  var mouseX = event.clientX;
  var mouseY = event.clientY;
	
  var dd = document.documentElement;
  var db = document.body;
  
  if (dd) {
		mouseX += dd.scrollLeft;
		mouseY += dd.scrollTop;
  }
  else if (db) {
		mouseX += db.scrollLeft;
		mouseY += db.scrollTop;
  }

  return {x: mouseX, y: mouseY};

}


ajax.Event.isLeftButton= function(event) {
  
  return (event.which) ? 
	       event.which == 1 && event.button == 0 :
	       (event.type == 'click') ? event.button == 0 : event.button == 1;

}


ajax.Event.isRightButton = function(event) {
  
  return event.button == 2;

}


ajax.Event.stopPropagation = function(event) {
  
  if (event.stopPropagation) event.stopPropagation();
  else event.cancelBubble = true;

}


ajax.Event.preventDefault = function(event) {
  
  if (event.preventDefault) event.preventDefault();
  else event.returnValue = false;

}


ajax.Event.stopEvent = function(event) {

  ajax.Event.stopPropagation(event);
  ajax.Event.preventDefault(event);

}


ajax.Event.bindAsListener = function(func, obj) {
  
  return function() {
	 return func.apply(obj, arguments);
  }

}