Sample Code Mouse Coordinates - JavaScript

 function checkwhere(e) {
        if (document.layers){
         xCoord = e.x;
         yCoord = e.y;
  }
        else if (document.all){
         xCoord = event.clientX;
         yCoord = event.clientY;
  }
        else if (document.getElementById){
         xCoord = e.clientX;
         yCoord = e.clientY;
  }
  if (shipSize>0){
   document.getElementById('movingShips').style.zIndex = -1;
   document.getElementById('movingShips').style.top  = yCoord-10+'px';
   document.getElementById('movingShips').style.left = xCoord-10+'px';
   document.getElementById('movingShips').style.position = 'absolute';
  }
      document.getElementById('divCoord').value = "X= "+ xCoord + "  Y= " + yCoord;  
 }
 document.onmousemove = checkwhere; // Calling the Mouse Coordinate Fantion