function addExt(url) {
				browserCheck();
				if (url != "files/") {
					document.getElementById('external').innerHTML = "Importing...";
					http_request.open('GET', url, true);
					http_request.onreadystatechange = function() {
						if (http_request.readyState == 4 && http_request.status == 200) {
							document.getElementById('external').innerHTML = http_request.responseText;
							document.getElementById('filename').innerHTML = url;
						} else {
							document.getElementById('external').innerHTML = "";
						}
					};
					http_request.send(null);
				} else {
					document.getElementById('external').innerHTML = "";
				}
			}
			function loadFileList() {
				browserCheck();
				http_request.open('GET', 'file_list.php', true);
				http_request.onreadystatechange = function() {
					if (http_request.readyState == 4 && http_request.status == 200) {
						document.getElementById('file_list').innerHTML = http_request.responseText;
					} else {
						document.getElementById('file_list').innerHTML = "";
					}
				};
				http_request.send(null);
			}
			function clrExt() {
				browserCheck();
				document.getElementById('external').innerHTML = "";
				document.getElementById('filename').innerHTML = "";
			}