/* Adapted from VoteItUp */
/* A general script for updating the contents of the vote widget on the fly */
/*
USAGE:
vote (object to update with vote count, object to update with after vote text, post id, user id, base url)
*/

var xmlHttp;
var currentobj;
var voteobj;
var aftervotetext;

// Useful for compatibility
function function_exists(function_name) { 
  if(typeof function_name == 'string'){
    return (typeof window[function_name] == 'function');
  } else {
    return (function_name instanceof Function);
  }
}

//Javascript Function for JavaScript to communicate with Server-side scripts
function lg_AJAXrequest(scriptURL) {
  xmlHttp = zGetXmlHttpObject()
  if(xmlHttp == null) {
    alert("Your browser does not support AJAX!");
    return;
  } 
  xmlHttp.onreadystatechange = zvoteChanged;
  xmlHttp.open("GET", scriptURL, true);
  xmlHttp.send(null);
}

function zGetXmlHttpObject() {
  var xmlHttp = null;
  try {
    // Firefox, Opera 8.0+, Safari
    xmlHttp = new XMLHttpRequest();
  } catch(e) {
    // Internet Explorer
    try {
      xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e) {
      xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
  return xmlHttp;
}

function zvoteChanged() { 
  if(xmlHttp.readyState == 4) { 
    var voteno = xmlHttp.responseText;
    currentobj_obj = document.getElementById(currentobj);
    voteobj_obj = document.getElementById(voteobj);
    currentobj_obj.innerHTML = '';//voteno;
    voteobj_obj.innerHTML = aftervotetext;
    voteobj_obj.style.color = 'green';
    voteobj_obj.style.fontWeight = 'bold';
    if(aftervotetext == '') {
      voteobj_obj.style.display = 'none';
    }
  }
}

function showVotingProgress() {
  currentobj_obj = document.getElementById(currentobj);
  voteobj_obj = document.getElementById(voteobj);
  currentobj_obj.innerHTML = 'Voting in progress...';
  voteobj_obj.innerHTML = '';
}

function vote(obj, votelinkobj, aftervote, postID, userID, baseURL) {
  currentobj = obj;
  voteobj = votelinkobj;
  aftervotetext = aftervote;
  var scripturl = baseURL+"/voteinterface.php?type=vote&tid=total&uid="+userID+"&pid="+postID+"&auth="+Math.random();
  showVotingProgress();
  lg_AJAXrequest(scripturl);
}

function sink(obj, votelinkobj, aftervote, postID, userID, baseURL) {
  currentobj = obj;
  voteobj = votelinkobj;
  aftervotetext = aftervote;
  var scripturl = baseURL+"/voteinterface.php?type=sink&tid=total&uid="+userID+"&pid="+postID+"&auth="+Math.random();
  showVotingProgress();
  lg_AJAXrequest(scripturl);
}