window.mouseYPosOld = 0;
$(document).mousemove(function(e){
      window.mouseYPos = e.pageY;

  
       
}); 

   
setInterval(function() {
    var souradY=window.mouseYPos;
    if(Math.abs(souradY-window.mouseYPosOld)>50){
      window.mouseYPosOld = souradY;
  
       $.get("testSouradnic.php", {souradniceY: souradY});
        }
        }, 1500);