function showRating(idBar, rating) {
  var idPost;
  idPost = idBar.substr(7);
  if(readCookie(idPost) == null) {
    document.getElementById(idBar).style.backgroundImage='url("/images/hodnoceni_'+rating+'.gif")';
  }
  return false;
}

function sendRating(idPost, rating) {
  if(readCookie(idPost) == null) {
    //alert('diky za hlas');
    createCookie(idPost, rating);
    
    http = createRequestObject();
    http.open('get', '/clip/ajaxAddRating/id/' + idPost + '/num/' + rating);
    http.onreadystatechange = handleResponse;
    http.send(null);
    
    showRating('rating_' + idPost, rating);    
  } else {
    //alert('uz si hasoval za - ' + readCookie(idPost));
  }
  return false;
}

function handleResponse() {
	if(http.readyState == 4){
    var response = http.responseText;
	
		if (response == 'ERROR'){
			alert("Sorry... Failed to update rating.");
		}
		else {
			//alert("Thanks for your time.");
		}
  }
}



/******************************************************************************/

function createRequestObject() {
  var ro;
  var browser = navigator.appName;
  
  if(browser == "Microsoft Internet Explorer"){
      ro = new ActiveXObject("Microsoft.XMLHTTP");
  }
  else {
      ro = new XMLHttpRequest();
  }
  return ro;    
}

function createCookie(name,value) {
	var date = new Date();
	date.setTime(date.getTime()+(10*24*60*60*1000));
	var expires = "; expires="+date.toGMTString();
	document.cookie = name+"="+value+expires+"; path=/";
}

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