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88 lines
2.0 KiB
88 lines
2.0 KiB
// server url
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var serverUrl = "http://widgets.vvo-online.de/abfahrtsmonitor/";
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// xmlhttp object function
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function getHTTPObject() {
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console.log("xml http object function");
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var xhr;
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if(window.XMLHttpRequest) {
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xhr = new XMLHttpRequest();
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} else if(window.ActiveXObject) {
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xhr = new ActiveXObject("Msxml2.XMLHTTP");
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}
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return xhr;
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}
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// ajax call function
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function ajaxCall(dataUrl, outputElement, callback) {
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console.log("ajax function");
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// get the xmlhttp object which is supported
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var request = getHTTPObject();
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outputElement.innerHTML = "Lade Daten ...";
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request.onreadystatechange = function() {
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if(request.readyState === 4 && request.status === 200) {
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//save ajax response
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var response = request.responseText;
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// check if callback is a function
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if(typeof callback === "function") {
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callback(response);
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}
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}
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};
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request.open("get", dataUrl, true);
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request.send(null);
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}
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// wrap all in anonymous function to get out of global scope
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(function() {
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console.log("anonymous function");
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// get the search form
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var searchForm = document.getElementById("search-form");
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// haltestelle object
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var haltestelle = {
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getInfo : function(event) {
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console.log("getInfo function");
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// prevent submit default behaviour
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event.preventDefault();
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// get output area
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var target = document.getElementById("output");
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var hstName = document.getElementById("q").value;
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var hstUrl = serverUrl + "Abfahrten.do?ort=dresden&hst=" + hstName;
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ajaxCall(hstUrl, target, function(data) {
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target.innerHTML = "";
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target.innerHTML = "<p>" + data + "</p>";
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});
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}
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};
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//event listeners
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searchForm.addEventListener("submit", haltestelle.getInfo, false);
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})(); // end of anonymous function
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