first commit

WEBFiles/site.js

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+/* Java for WEB device */
+var ajaxList = new Array(); // Stores a queue of AJAX events to process
+var nextimeout = 500;
+function newAJAXCommand(url, container, repeat, data) {
+	// Set up our object
+	var newAjax = new Object();
+	var theTimer = new Date();
+	newAjax.url = url;
+	newAjax.container = container;
+	newAjax.repeat = repeat;
+	newAjax.ajaxReq = null;
+	// Create and send the request
+	if (window.XMLHttpRequest) {
+		newAjax.ajaxReq = new XMLHttpRequest();
+		newAjax.ajaxReq.open((data == null) ? "GET" : "POST", newAjax.url, true);
+		newAjax.ajaxReq.send(data);
+		// If we're using IE6 style (maybe 5.5 compatible too)
+	} else if (window.ActiveXObject) {
+		newAjax.ajaxReq = new ActiveXObject("Microsoft.XMLHTTP");
+		if (newAjax.ajaxReq) {
+			newAjax.ajaxReq.open((data == null) ? "GET" : "POST", newAjax.url, true);
+			newAjax.ajaxReq.send(data);
+		}
+	}
+	newAjax.lastCalled = theTimer.getTime();
+	// Store in our array
+	ajaxList.push(newAjax);
+}
+function pollAJAX() {
+	var curAjax = new Object();
+	var theTimer = new Date();
+	var elapsed;
+	// Read off the ajaxList objects one by one
+	for (i = ajaxList.length; i > 0; i--) {
+		curAjax = ajaxList.shift();
+		if (!curAjax)
+			continue;
+		elapsed = theTimer.getTime() - curAjax.lastCalled;
+		// If we suceeded
+		if (curAjax.ajaxReq.readyState == 4 && curAjax.ajaxReq.status == 200) {
+			// If it has a container, write the result
+			if (typeof (curAjax.container) == 'function')
+				curAjax.container(curAjax.ajaxReq.responseXML.documentElement);
+			else if (typeof (curAjax.container) == 'string')
+				document.getElementById(curAjax.container).innerHTML = curAjax.ajaxReq.responseText;
+			// (otherwise do nothing for null values)
+			curAjax.ajaxReq.abort();
+			curAjax.ajaxReq = null;
+			// If it's a repeatable request, then do so
+			if (curAjax.repeat) {
+				if (elapsed >= curAjax.repeat)
+					elapsed = 100;
+				else
+					elapsed = curAjax.repeat - elapsed;
+				setTimeout("newAJAXCommand('" + curAjax.url + "',"
+						+ curAjax.container + "," + curAjax.repeat + ")",
+						elapsed);
+			}
+			continue;
+		}
+		// If we've waited over 4 second, then we timed out
+		if ((curAjax.ajaxReq.readyState == 4 && curAjax.ajaxReq.status == 404)
+				|| (elapsed > 4000)) {
+			// Invoke the user function with null input
+			if (typeof (curAjax.container) == 'function')
+				curAjax.container(null);
+			else
+				// Alert the user
+				alert("Command failed.\nConnection to device was lost.");
+			curAjax.ajaxReq.abort();
+			curAjax.ajaxReq = null;
+			// If it's a repeatable request, then do so
+			if (curAjax.repeat)
+				setTimeout("newAJAXCommand('" + curAjax.url + "',"
+						+ curAjax.container + "," + curAjax.repeat + ")", 200);
+			continue;
+		}
+		// Otherwise, just keep waiting
+		ajaxList.push(curAjax);
+	}
+	// Call ourselves again in 10ms?
+	setTimeout("pollAJAX()", nextimeout);
+}// End pollAjax
+function getXMLValue(xmlData, field) {
+	try {
+		if (xmlData.getElementsByTagName(field)[0].firstChild.nodeValue)
+			return xmlData.getElementsByTagName(field)[0].firstChild.nodeValue;
+		else
+			return null;
+	} catch (err) {
+		return null;
+	}
+}
+//kick off the AJAX Updater
+setTimeout("pollAJAX()", nextimeout);