// JavaScript Document

var posting = false;
var geting  = false;
var loaded  = false;

var menu_link = new Array();
menu_link[0] = 3;
menu_link[1] = 4;
menu_link[2] = 5;
menu_link[3] = 8;

window.onload = function(){	
	loaded = true;
}

function executeAjax(callback, url) {
	// branch for native XMLHttpRequest object
	if (window.XMLHttpRequest) {
		req = new XMLHttpRequest();
		req.onreadystatechange = callback;
		req.open("GET", url, true);
		req.send(null);
	} // branch for IE/Windows ActiveX version
	else if (window.ActiveXObject) {
		req = new ActiveXObject("Microsoft.XMLHTTP");
		if (req) {
			req.onreadystatechange = callback;
			req.open("GET", url, true);
			req.send();
		}
	}
}

var http_request = false;
function makePOSTRequest(url, parameters) {
	http_request = false;
	posting = true;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Cannot create XMLHTTP instance');
		return false;
	}
	
	http_request.onreadystatechange = alertContents;
	http_request.open('POST', url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_request.setRequestHeader("Content-length", parameters.length);
	http_request.setRequestHeader("Connection", "close");
	http_request.send(parameters);
}

function alertContents() {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			result = http_request.responseText;
						posting = false;
		} else {
			alert('There was a problem with the request.');
			posting = false;
		}
	}
}

function getContent(url,id) {
	if(loaded) {
		var obj = document.getElementById(id);
		geting = true;
	}
	
	if(!loaded || posting) {
		setTimeout("getContent('" + url + "', '" +id + "')",250);		
	} else {
		var callback = function() {
			if(req.readyState == 4) {
				if(req.status == 200) {
					obj.innerHTML = req.responseText;
					geting = false;
				}
			}
		}
		executeAjax(callback, url);
	}
}

function getLink(i) {
	if(!menu_link[i]) {
		i = 0;
	}
	getContent('ajax/text.php?id=' + menu_link[i], 'content');
}