function GetXmlHttpObject() {
	var xmlHttp=null;
	try {
	xmlHttp=new XMLHttpRequest();
	} catch (e) {
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return (xmlHttp);
}

function makePOSTRequest(url, parameters) {
	xmlHttp = GetXmlHttpObject();
	xmlHttp.open('POST', url, true);
	xmlHttp.send(parameters);
	//alert(parameters);
}

function stateChanged() {
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
		document.getElementById(divShow).innerHTML=xmlHttp.responseText;
	} else {
		document.getElementById(divShow).innerHTML = "<img name='loading' src='images/ajax-loader.gif' />Loading ...";
	}	
}

function clr_div(divNeed) {
	alert(divNeed);
	document.getElementById(divNeed).innetHTML="";
}

function load_module(divNeed,url,id,page) {
	var xmlHttp=GetXmlHttpObject();
	//alert(url);
	if(!page) {
		page = 1;
	}
	xmlHttp.open('GET',url+".php?id="+encodeURIComponent(id)+"&page="+page,true);
	xmlHttp.onreadystatechange = function() {
		if (xmlHttp.readyState==4&&xmlHttp.status==200) {
			document.getElementById(divNeed).innerHTML=xmlHttp.responseText;
			xmlHttp=null;
		} else {
			document.getElementById(divNeed).innerHTML="<img name='loading' src='images/ajax-loader.gif' align='absmiddle' /> Loading ...";
		}
	};
	xmlHttp.send(null);
	return false;
}
function load_content(divNeed,url,id,page) {
	var xmlHttp=GetXmlHttpObject();
	//alert(url);
	xmlHttp.open('GET',url+".php?id="+encodeURIComponent(id)+"&page="+page,true);
	xmlHttp.onreadystatechange = function() {
		if (xmlHttp.readyState==4&&xmlHttp.status==200) {
			document.getElementById(divNeed).innerHTML=xmlHttp.responseText;
			xmlHttp=null;
		} else {
			document.getElementById(divNeed).innerHTML="<div align='center'><img name='loading' src='images/ajax-loader.gif' align='absmiddle' /></div";
		}
	};
	xmlHttp.send(null);
}

function postData(url, parameters) {
	xmlHttp = GetXmlHttpObject();
	xmlHttp.open('POST', url+".php", true);
	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp.setRequestHeader("Content-length", parameters.length);
	xmlHttp.setRequestHeader("Connection", "close");
	xmlHttp.send(parameters);
	//alert(parameters);
}

function loadPage(links){
	var url = ""+links.href+"";
	var index = url.indexOf("#");
	if(index == -1) {
		load_module("divContent", "home");
	}
	else {
		var mod = url.substring(index+1);
		var params = mod.split("/", 3);
		if(!params[0]) {
			params[0] = "home";
		}
		location.href = url;
		load_module("divContent", params[0], params[1], params[2]);
	}
	/*scrollTop();*/
}

/*test*/
function postRequest(url,parameters,div_result) {
	xmlHttp = GetObject(); 
	divResult = div_result;
	xmlHttp.onreadystatechange = stateChange; 
	xmlHttp.open('POST', url, true);
	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); //Khai bao de server nhan phuong thuc POST
	xmlHttp.setRequestHeader("Content-length", parameters.length);
	xmlHttp.setRequestHeader("Connection", "close");
	xmlHttp.send(parameters);
}

/* khanhnguyen - 21/08/2008 */
function load_content_related(divNeed,url,id) {
	var xmlHttp=GetXmlHttpObject();
	xmlHttp.open('GET',url+".php?id="+id,true);
	xmlHttp.onreadystatechange = function() {
		if (xmlHttp.readyState==4&&xmlHttp.status==200) {
			document.getElementById(divNeed).innerHTML=xmlHttp.responseText;
			xmlHttp=null;
		} else {
			document.getElementById(divNeed).innerHTML="<div align='center'><img name='loading' src='images/ajax-loader.gif' align='absmiddle' border='0' /></div>";
		}
	};
	xmlHttp.send(null);
}