// JavaScript Document

  function createXMLHttpRequest(){
	if(window.ActiveXObject) {
	  xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	}else if (window.XMLHttpRequest) {
	  xmlHttp = new XMLHttpRequest();
	}
  }

  function cheq(slot,post_id) {
	
	createXMLHttpRequest();

	var url = "http://www.hipcheq.com/user/cheq-post.php?post=" + post_id + "&element=slot" + slot + "l";

	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange = handleStateChange;
	xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	xmlHttp.send(url);

  }

  function handleStateChange(){
	if(xmlHttp.readyState == 4){
	  if(xmlHttp.status == 200) {
		parseResults();
	  }
	}
  }

  function parseResults() {
	
	var results = xmlHttp.responseXML;
	var response = results.getElementsByTagName("response");
	
	var code = '';
	var element = '';
	var message = '';
	var return_val = '';
	
	code = response[0].getElementsByTagName("code")[0].firstChild.nodeValue;
	element = response[0].getElementsByTagName("element")[0].firstChild.nodeValue;
	message = response[0].getElementsByTagName("message")[0].firstChild.nodeValue;
	return_val = response[0].getElementsByTagName("return")[0].firstChild.nodeValue;

	updateResponse(code,element,message,return_val);
	
  }

  function updateResponse(code,element,message,return_val){
	
	//find response element (e.g. where the response will update in the browser)
	var responseElement = document.getElementById(element);	
	
	//initialize response node
	var node_open;
	var node_content;
	var node_close;
	
	//if cheq request was successful, update cheq count
	if(code == 200){
		
	  //initialize span element
	  var cheq_container = document.createElement('span');
	  var cheq_count = document.createTextNode(return_val);
	  cheq_container.setAttribute('class','blue-text');
	  cheq_container.appendChild(cheq_count);
	  
	  //build response node pieces
	  node_open = document.createTextNode("[+] cheq [ ");
	  node_close = document.createTextNode(" ] ");
	  
	  //clean response node
	  while(responseElement.childNodes.length > 0){ responseElement.removeChild(responseElement.childNodes[0]); }
	  
	  //build node
	  responseElement.appendChild(node_open);
	  responseElement.appendChild(cheq_container);
	  responseElement.appendChild(node_close);
	  
	}else{
	  
	  //build node pieces
	  node_open = document.createTextNode(message);
	  
	  //clean response node
	  while(responseElement.childNodes.length > 0){ responseElement.removeChild(responseElement.childNodes[0]); }
	  
	  //build node
	  responseElement.appendChild(node_open);

	}
	
  }
  
  function informLogin(element){
	
	var responseElement = document.getElementById(element);
	var responseText = "please <a href='http://www.hipcheq.com/login/'>login</a> or <a href='http://www.hipcheq.com/login/register.php'>register</a>.";
	
	//clean element
	while(responseElement.childNodes.length > 0){
	  responseElement.removeChild(responseElement.childNodes[0]);
	}
	
	responseElement.innerHTML = responseText;
	
	  
  }