var http_request = false;

   function makePOSTRequest(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = alertContents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }
   function alertContents() {

      if (http_request.readyState == 4) {
		var mydiv = document.getElementById("commentwindowwrapper");
		var newdiv = document.createElement("div");
		newdiv.id = "commentwindow";
		newdiv.innerHTML = "<img src='/images/ajax-loader.gif'>";
		mydiv.insertBefore(newdiv,mydiv.firstChild);
         if (http_request.status == 200) {
		 document.getElementById("comment").value = '';
		var res = http_request.responseText;
		newdiv.innerHTML = res;
            //alert(http_request.responseText);
              
         } else {
            alert('There was a problem with the request.'+http_request.status);
         }
      }
   }
   
   function get(obj) {
      var poststr = "comment=" + encodeURI( document.getElementById("comment").value ) + "&post_id=" + encodeURI( document.getElementById("post_id").value );
      makePOSTRequest('http://gamerblogz.com/ajax_com_ins.php', poststr);
   }