function httpGetAsync(url, callback) {
	const xmlHttp = new XMLHttpRequest();

	xmlHttp.onreadystatechange = function () {
		if (xmlHttp.readyState === 4)
		{
			try {
				callback(JSON.parse(xmlHttp.responseText), xmlHttp.status);
			} catch( e )
			{
				callback({}, 500);
			}
		}
	}
	xmlHttp.open("GET", url, true); // true for asynchronous
	xmlHttp.send(null);
}

function httpPostAsync(url, data, callback) {
	const xmlHttp = new XMLHttpRequest();
	xmlHttp.onreadystatechange = function () {
		if (xmlHttp.readyState === 4)
		try {
                        callback(JSON.parse(xmlHttp.responseText), xmlHttp.status);
                } catch( e )
                {
	                callback({}, 500);
                }

	}
	xmlHttp.open("POST", url, true); // true for asynchronous
	xmlHttp.setRequestHeader("Content-Type", "application/json");
	xmlHttp.send(JSON.stringify(data));
}


const modal = document.getElementById("myModal");
const modal_title = document.getElementById("modal-title");
const modal_text = document.getElementById("modal-text");
let last_add = 0;


// Get the <span> element that closes the modal
const modal_span = document.getElementsByClassName("close")[0];


// When the user clicks on <span> (x), close the modal
modal_span.onclick = function() {
	modal.style.display = "none";
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
	if (event.target === modal) {
		modal.style.display = "none";
	}
}

function openModal(title,text)
{
	modal_title.innerText = title;
	modal_text.innerHTML = text;
	modal.style.display = "block"
}