function setHeaderButton() {
  var cookies = document.cookie;
  if(cookies.indexOf("AUTH_TOKEN=") != -1) {                 //set related header button while user in login status
	document.getElementById("loginBtn").style.display = "none";
	document.getElementById("registryBtn").style.display = "none";  
	document.getElementById("logoutBtn").style.display = "inline-block";
	document.getElementById("mysiteBtn").style.display = "inline-block";	  
  } else {                                                  //set related header button while user in logout status
	document.getElementById("loginBtn").style.display = "inline-block";
	document.getElementById("registryBtn").style.display = "inline-block";
	document.getElementById("logoutBtn").style.display = "none";
	document.getElementById("mysiteBtn").style.display = "none";		
  }
}