diff --git a/snippets/map.html b/snippets/map.html
index f90da26..8f8edeb 100644
--- a/snippets/map.html
+++ b/snippets/map.html
@@ -34,7 +34,7 @@
 </div>
 
 <div class="slidecontainer">
-  <input class="slider" id="datetimeslider" type="range" label="Zeitpunkt" min="0" max="0" step="1" value="" onchange="updateSlider(this)" ontouchmove="updateSliderTooltip(this)" onmousemove="updateSliderTooltip(this)" />
+  <input class="slider" id="datetimeslider" type="range" label="Zeitpunkt" min="0" max="0" step="1" value="" ontouchmove="updateSliderTooltip(this)" onmousemove="updateSliderTooltip(this)" />
 </div>
 {{ else }}
 <h4>Bitte zuerst <a href="login.html">einloggen</a></h4>
diff --git a/static/js/map.js b/static/js/map.js
index 9a4bf4f..177ec29 100644
--- a/static/js/map.js
+++ b/static/js/map.js
@@ -5,6 +5,7 @@ var stop = urlParams.get('stop');
 var lon = urlParams.get('lon');
 var lat = urlParams.get('lat');
 var map;
+var last_slider_position;
 
 if (start == null) {
   var dstart = moment({hour: 0});
@@ -47,6 +48,7 @@ function refreshDatapoints(deveui, start, stop) {
     datapoints = mydata;
     $('#datetimeslider').attr('max', mydata.length - 1);
     $('#datetimeslider').val(mydata.length - 1);
+    last_slider_position = mydata.length - 1;
     var unix_timestamp = mydata[mydata.length - 1][0];
     var date = new Date(unix_timestamp * 1000);
     var myhtml = moment(date).format('DD.MM.YYYY HH:mm') + ' / ' + mydata[mydata.length - 1][3] + '% <i class="fa fa-battery-three-quarters"></i>';
@@ -54,27 +56,8 @@ function refreshDatapoints(deveui, start, stop) {
   });
 }
 
-function updateSlider(c)
-{
-    if(c.value <=  50000)
-  {
-    if(c.step != 1)
-        c.step = 1;
-    //alert(c.value);
-  }
-  else
-  {
-     if(c.step != 3)
-        c.step = 3;
-    //alert(c.value);
-  }
-}
-
-
 $(document).ready(function() {
   var position = ol.proj.fromLonLat([lon, lat], "EPSG:2056");
-  console.log("Document Ready Position:");
-  console.log(position);
   
   var layer = ga.layer.create('ch.swisstopo.pixelkarte-farbe');
   map = new ga.Map({
@@ -184,6 +167,13 @@ $(function() {
 
 function updateSliderTooltip(c)
 {
+  if (c.value == last_slider_position) {
+    // we don't do anything if slider position did not change...
+    return
+  }
+
+  last_slider_position = c.value;
+  console.log("Slider position changed...");
   var unix_timestamp = datapoints[c.value][0];
   var date = new Date(unix_timestamp * 1000);
   var myhtml = moment(date).format('DD.MM.YYYY HH:mm') + ' / ' + datapoints[c.value][3] + '% <i class="fa fa-battery-three-quarters"></i>';
@@ -191,9 +181,6 @@ function updateSliderTooltip(c)
 
   var position = ol.proj.fromLonLat([datapoints[c.value][2], datapoints[c.value][1]], "EPSG:2056");
 
-  console.log("updateSliderTooltip Position:");
-  console.log(position);
-
   // Create the layer with the icon
   var vectorLayer2 = new ol.layer.Vector({
     source: new ol.source.Vector({