text: document.getElementById("id_bussiness_version").innerHTML="Logic version: 2018.12.03.0";
  window.addEventListener("deviceorientation" , on_device_orientation);
  
  //-----------
  function  on_device_orientation(e)
  {
  
  
  	var svg = document.getElementById("id_svg");
  	var cerc = document.getElementById("id_cerc");
  
  	let R=20;
  
  	var svg_height = svg.getAttribute("height");
  	var svg_width = svg.getAttribute("width");
  	cerc.setAttribute("cx", svg_width/2 + e.gamma / 90 *(svg_width/2 -R));
  	cerc.setAttribute("cy", svg_height /2 + e.beta/90*(svg_height/2-R));
  }
  //-----------
  