How to display the latitude and longitude in from this code using Openlayers?

Answer 1

This is what you need:

map.events.register("click", map, function(e) {
  var position = map.getLonLatFromPixel(e.xy);

  OpenLayers.Util.getElement("mydiv").innerHTML = 
        position.lon.toFixed(3) + ', ' + position.lat.toFixed(3);

});

You can see here the code working: http://jsbin.com/uyuka6

So, your code should looks:

function init(){

      var map, vectors, controls;
      map = new OpenLayers.Map('map');
      var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
        "http://vmap0.tiles.osgeo.org/wms/vmap0?", {layers: 'basic'});

      vectors = new OpenLayers.Layer.Vector("Vector Layer");

      map.addLayers([wms, vectors]);
      map.addControl(new OpenLayers.Control.LayerSwitcher());
      map.addControl(new OpenLayers.Control.MousePosition());
      //map.addControl(new OpenLayers.Control.Click());

      map.events.register("click", map, function(e) {
         var position = map.getLonLatFromPixel(e.xy);

         OpenLayers.Util.getElement("shortdesc").innerHTML =
             position.lon.toFixed(3) + ', ' + position.lat.toFixed(3);

      });

      controls = {
           point: new OpenLayers.Control.DrawFeature(vectors,
             OpenLayers.Handler.Point),

           line: new OpenLayers.Control.DrawFeature(vectors,
             OpenLayers.Handler.Path),
           polygon: new OpenLayers.Control.DrawFeature(vectors,
             OpenLayers.Handler.Polygon),
           drag: new OpenLayers.Control.DragFeature(vectors)
       };

       var poly = controls['polygon'].handler;
       poly.callbacks.point = function(point){
           OpenLayers.Util.getElement("docs").innerHTML = point.toString();
       };

       var line = controls['line'].handler;
       line.callbacks.point = function(point){
          OpenLayers.Util.getElement("docs").innerHTML = point.toString();
       };

       for(var key in controls) {
          map.addControl(controls[key]);
          // map.addControl(click);
       }

       map.setCenter(new OpenLayers.LonLat(0, 0), 3);
       document.getElementById('noneToggle').checked = true;
}