//functions.js
//Create a boolean variable to check for a valid Internet Explorer instance.
var xmlhttp = false;
//Check if we are using IE.
try {
  //If the javascript version is greater than 5.
  xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
  //If not, then use the older active x object.
  try {
    //If we are using IE.
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  } catch (E) {
    //Else we must be using a non-IE browser.
    xmlhttp = false;
  }
}
//If we are using a non-IE browser, create a javascript instance of the object.
if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
  xmlhttp = new XMLHttpRequest();
}

function vote_page(sform) {
    var form = sform;
    for (var i=0; i < form.elements.length - 0; i++)
      	{
      		if(form.elements[i].type=='radio')
      			if (form.elements[i].checked == true)
      				var val = form.elements[i].value;
      	}
    var params = 'choice=' + val;
    serverPage = 'index.php?c=survey&m=doSurvey';
  	xmlhttp.open("POST", serverPage);
  	xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xmlhttp.setRequestHeader("Content-length", params.length);
    xmlhttp.setRequestHeader("Connection", "close");
  	xmlhttp.send(params);
  	xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
          alert ("Cảm ơn bạn đã tham gia bình chọn");
        }
    }
   }

function vote_pages(sform) {
    var form = sform;
    for (var i=0; i < form.elements.length - 0; i++)
      	{
      		if(form.elements[i].type=='radio')
      			if (form.elements[i].checked == true)
      				var val = form.elements[i].value;
      	}
    var params = 'choice=' + val;
    serverPage = 'index.php?c=survey&m=doSurveyM';
  	xmlhttp.open("POST", serverPage);
  	xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xmlhttp.setRequestHeader("Content-length", params.length);
    xmlhttp.setRequestHeader("Connection", "close");
  	xmlhttp.send(params);
  	xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
          alert ("Cảm ơn bạn đã tham gia bình chọn");
        }
    }
   }
   
function random_ad()
  {
    var obj = document.getElementById("display_ad");
    serverPage = 'index.php?c=page&m=Ad_random';
  	xmlhttp.open("GET", serverPage, true);
  	xmlhttp.send(null);
  	xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
          obj.innerHTML = xmlhttp.responseText;
        }
    }
    setTimeout("random_ad()", 5000);
  }