var xmlHttp;

function GetXmlHttpObject()
{
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}

function getShoutbox() {
    xmlHttp=GetXmlHttpObject();
    if (xmlHttp==null) {
      alert ("Browser does not support HTTP Request");
      return
    }

    var url="getShoutbox.php";
    url=url+"?sid="+Math.random();
    xmlHttp.onreadystatechange=getShoutbox_changed;
    xmlHttp.open("GET",url,true);
    xmlHttp.send(null);

}

function getShoutbox_changed() {
  if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
    document.getElementById('ShoutOut').innerHTML=xmlHttp.responseText;
  }
}

function writeShoutbox() {
  xmlHttp=GetXmlHttpObject();
  if (xmlHttp==null) {
    alert ("Browser does not support HTTP Request");
    return
  }

  var sendXML;
  
  sendXML = "<txt>" + document.getElementById('ShoutTxt').value + "</txt>";
  sendXML = sendXML + "<user>" + document.getElementById('loggedUser').value + "</user>";
  
  var url="writeShoutbox.php";
  xmlHttp.onreadystatechange=writeShoutbox_changed;
  xmlHttp.open("POST",url,true);
  xmlHttp.send(sendXML);
  document.getElementById('ShoutTxt').value = "";
}

function writeShoutbox_changed() {
  if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
    getShoutbox(); 
  }
}

function checkShoutboxSubmit(e) {
  var keynum;
  var keychar;
  
  if (window.event) {
    keynum = e.keyCode
	} else if(e.which)  {
    keynum = e.which
	}
  keychar = String.fromCharCode(keynum)
  if (keychar == "\r") {
    writeShoutbox();
  }
}