function getCookie(cname) {
  var name = cname + "=";
  var decodedCookie = decodeURIComponent(document.cookie);
  var ca = decodedCookie.split(';');
  for(var i = 0; i <ca.length; i++) {
    var c = ca[i];
    while (c.charAt(0) == ' ') {
      c = c.substring(1);
    }
    if (c.indexOf(name) == 0) {
      return c.substring(name.length, c.length);
    }
  }
  return null;
}

function setCookie(cname, cvalue, exdays) {
	  var d = new Date();
	  d.setTime(d.getTime() + (exdays*24*60*60*1000));
	  var expires = "expires="+ d.toUTCString();
	  document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}

function delCookie(cname) {
	  var d = new Date();
	  var expires = "expires="+ d.toUTCString();
	  document.cookie = cname + "='';" + expires + ";path=/"; 
}

function loadCookie(cname, def){
    
	  let temp = getCookie(cname);
	  
	  if(temp == null){
		  return def;
		  
	  }else{
		  
		  try {
			  
			  let value = JSON.parse(temp);
			  return value;
			  
		  }catch(e){
			  return temp
		  }
		  
	  }
}