Renvoyer une requête le X second

// JavaScript Document

function CntOnLine(Dpsl){
	var Url = "styles/QrysPg.php";
	try{
	   request = new XMLHttpRequest();
	   request.abort();
	   request.open("GET", Url, true);
	   request.onreadystatechange = function() {
		  if (request.readyState == 4 && request.status == 200) {
			 if(request.responseText.length != 0){
				FnDisplay(request.responseText, Dpsl);
			 }else{
				ObjDpsl.innerHTML = "aucun membre connect" + unescape("%E9");
			 }
		  }
	   };
	  this.request.send(null);
	 }
	 catch(exc){	}
	 
}

function FnDisplay(reqResult, DpslNm){							//FONCTION D'AFFICHAGE DE LA LISTE
  var ObjDpsl = document.getElementById(DpslNm);
  var ArrayResult = reqResult.split("\n");
  
    for (var i=0; i<ArrayResult.length; i++){
      ArrayResult2 = ArrayResult[i].split(":");  
	  ObjDpsl.innerHTML += "<span id='DestFrd' onclick=\"DestSelect('"+ArrayResult2[0]+"', '"+ArrayResult2[1]+"')\" >"+ArrayResult2[1]+"</span>";
	}
}

function DestSelect(Id, Pseudo){
	var destId = document.getElementById("destId");
	var selecteddest = document.getElementById("selecteddest");
	destId.value =Id;
	selecteddest.value = Pseudo;

}

function SendMsg(Id, PseudoEx, Msg, IdDest, PseudoDest){
	var Msgtxt = document.getElementById(Msg);
	var IdDst = document.getElementById(IdDest);
	var PseudoDst = document.getElementById(PseudoDest);

	DsplMsg(PseudoEx, Msgtxt.value, PseudoDst.value);
	Msgtxt.value ="";
	//Msgtxt.focus();
}

function DsplMsg(Pseudo, Msg, PseudoDest){
var MsgDspl = document.getElementById("MsgDspl");
MsgDspl.value += Pseudo+" : "+Msg+"\n";
}