How can I use javascript timing to control on mouse stop and on mouse move events

Question

So I have a control (a map) on an aspx page. I want to write some javascript to onload setup the following:

1. when mouse stops on control = some code

Answer 1

That is a tricky one. A little bit of tinkering resulted in this:

function setupmousemovement() {

  var map1 = document.getElementById('Map_Panel');
  map1.onmousemove = (function() {
    var timer,
        timer250,
        onmousestop = function() {

          // code to do on stop

          clearTimeout( timer250 ); // I'm assuming we don't want this to happen if mouse stopped
          timer = null;  // this needs to be falsy next mousemove start
        };
    return function() {
      if (!timer) {

        // code to do on start

        timer250 = setTimeout(function () { // you can replace this with whatever

          // code to do when 250 millis have passed

        }, 250 );
      }
      // we are still moving, or this is our first time here...
      clearTimeout( timer );  // remove active end timer
      timer = setTimeout( onmousestop, 25 );  // delay the stopping action another 25 millis
    };

  })();

};

The reason your code does not work is that mousemove fires repeatedly while the mouse is moving and you are starting new timeouts every time.