script type="text/javascript">
				function focuson()
				{
				document.register.username.focus()
				}
			</script>

			<!--cek user-->
			<script language="javascript">
			var XMLHTTPRequestObject = false;
			if (window.XMLHttpRequest) {
				XMLHttpRequestObject = new XMLHttpRequest();
			} else if (window.ActiveXObject) {
				XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHttp");
			}
			function getusername(dataSource) {
				if (XMLHttpRequestObject) {
					XMLHttpRequestObject.open("GET", dataSource);
					XMLHttpRequestObject.onreadystatechange = function()
				{
					if (XMLHttpRequestObject.readyState == 4 && XMLHttpRequestObject.status == 200) {
						if (XMLHttpRequestObject.responseText == "terdaftar") {
							var target = document.getElementById("target");
							target.innerHTML = "<div><font color=red>Username <b>"+input.value+"</b> is not available!!</font></div>";
						} else {
							var target = document.getElementById("target");
							target.innerHTML = "<div><font color=blue>Username <b>"+input.value+"</b> is available.. </font></div>";
						}
					}
				}
				XMLHttpRequestObject.send(null);
				}
			}
			function cekusername(keyEvent) {
				keyEvent = (keyEvent) ? keyEvent: window.event;
				input = (keyEvent.target) ? keyEvent.target : keyEvent.srcElement;
				if (keyEvent.type == "keyup") {
					var target = document.getElementById("target");
					target.innerHTML = "<div></div>";
					if (input.value) {
						getusername("cek_user.php?qu=" + input.value);
					}
				}
			}
		</script>