/* Simple AJAX Code-Kit (SACK) */
/* ©2005 Gregory Wild-Smith */
/* www.twilightuniverse.com */
/* Software licenced under a modified X11 licence, see documentation or authors website for more details */
if (window.parent!=window)
 { 
  alert('Trang web ban dang vao khong phai la website chinh thuc cua lich khai giang. Chung toi khong chiu trach nhiem ve tinh chinh xac cua thong tin cung do an toan cua trang web nay.\r\nVui long nhan OK de quay lai trang chinh thuc www.lichkhaigiang.com');
  window.open(location.href, '_top', '');
 }
 
var lastColor;
function DG_changeBackColor(row, highlight,bcolor)
{
			if (highlight)
			{
				row.style.cursor = "pointer";
				lastColor = row.style.backgroundColor;
				row.style.backgroundColor = bcolor;
			}
			else
				row.style.backgroundColor = lastColor;
}
function sack(file)
{
	this.AjaxFailedAlert = "Trình duyệt của bạn không hỗ trợ Load Ajax. Bạn nên chọn một trình duyệt khác để sử dụng được tất cả chức năng của hệ thống.\n";
	this.requestFile = file;
	this.method = "POST";
	this.URLString = "";
	this.encodeURIString = true;
	this.execute = false;

	this.onLoading = function() { };
	this.onLoaded = function() { };
	this.onInteractive = function() { };
	this.onCompletion = function() { };

	this.createAJAX = function() 
	{
		try 
		{
			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e) 
		{
			try 
			{
				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch (err) 
			{
				this.xmlhttp = null;
			}
		}
		
		if(!this.xmlhttp && typeof XMLHttpRequest != "undefined")
			this.xmlhttp = new XMLHttpRequest();
			
		if (!this.xmlhttp)
		{
			this.failed = true; 
		}
	};
	
	this.setVar = function(name, value)
	{
		if (this.URLString.length < 3){
			this.URLString = name + "=" + value;
		} else {
			this.URLString += "&" + name + "=" + value;
		}
	}
	
	this.encVar = function(name, value)
	{
		var varString = encodeURIComponent(name) + "=" + encodeURIComponent(value);
		return varString;
	}
	
	this.encodeURLString = function(string)
	{
		varArray = string.split('&');
		for (i = 0; i < varArray.length; i++)
		{
			urlVars = varArray[i].split('=');
			
			if (urlVars[0].indexOf('amp;') != -1)
			{
				urlVars[0] = urlVars[0].substring(4);
			}
			
			varArray[i] = this.encVar(urlVars[0],urlVars[1]);
		}
		return varArray.join('&');
	}
	
	this.runResponse = function()
	{
		eval(this.response);
	}
	
	this.runAJAX = function(urlstring)
	{
		this.responseStatus = new Array(2);
		
		if(this.failed && this.AjaxFailedAlert)
		{ 
			alert(this.AjaxFailedAlert); 
		} 
		else 
		{
			if (urlstring)
			{ 
				if (this.URLString.length)
				{
					this.URLString = this.URLString + "&" + urlstring; 
				} 
				else 
				{
					this.URLString = urlstring; 
				}
			}
			
			if (this.encodeURIString)
			{
				var timeval = new Date().getTime(); 
				this.URLString = this.encodeURLString(this.URLString);
				this.setVar("rndval", timeval);
			}
			
			if (this.element) 
			{ 
				this.elementObj = document.getElementById(this.element); 
			}
			
			if (this.xmlhttp)
			{
				var self = this;
				if (this.method == "GET") 
				{
					var totalurlstring = this.requestFile + "?" + this.URLString;
					this.xmlhttp.open(this.method, totalurlstring, true);
				} 
				else 
				{
					this.xmlhttp.open(this.method, this.requestFile, true);
				}
				
				if (this.method == "POST")
				{
  					try 
  					{
						this.xmlhttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded')  
					} 
					catch (e) {}
				}

				this.xmlhttp.send(this.URLString);
				
				this.xmlhttp.onreadystatechange = function() 
				{
					switch (self.xmlhttp.readyState)
					{
						case 1:
							self.onLoading();
							break;
							
						case 2:
							self.onLoaded();
							break;
							
						case 3:
							self.onInteractive();
							break;
							
						case 4:
							self.response = self.xmlhttp.responseText;
							self.responseXML = self.xmlhttp.responseXML;
							self.responseStatus[0] = self.xmlhttp.status;
							self.responseStatus[1] = self.xmlhttp.statusText;
							self.onCompletion();
							
							if(self.execute)
							{ 
								self.runResponse(); 
							}
							
							if (self.elementObj) 
							{
								var elemNodeName = self.elementObj.nodeName;
								elemNodeName.toLowerCase();
								
								if (elemNodeName == "input" || elemNodeName == "select" || elemNodeName == "option" || elemNodeName == "textarea")
								{
									self.elementObj.value = self.response;
								} 
								else 
								{
									self.elementObj.innerHTML = self.response;
								}
							}
							
							self.URLString = "";
							break;
						}
				};
			}
		}
	};
	
	this.createAJAX();
}