var request;var queryString;   //will hold the POSTed datafunction sendData(){    setQueryString();    var url="http://www.parkerriver.com/s/sender";    httpRequest("POST",url,true);}//event handler for XMLHttpRequestfunction handleCheck(){    if(request.readyState == 4){        if(request.status == 200){            alert(request.responseText);        } else {            alert("A problem occurred with communicating between the XMLHttpRequest object and the server program.");        }    }//end outer if}/* Initialize a Request object that is already constructed */function initReq(reqType,url,bool){    /* Specify the function that will handle the HTTP response */    request.onreadystatechange=handleCheck;    request.open(reqType,url,bool);    request.setRequestHeader("Content-Type",            "application/x-www-form-urlencoded; charset=UTF-8");    request.send(queryString);}/* Wrapper function for constructing a Request object. Parameters:  reqType: The HTTP request type such as GET or POST.  url: The URL of the server program.  asynch: Whether to send the request asynchronously or not. */function httpRequest(reqType,url,asynch){    //Mozilla-based browsers    if(window.XMLHttpRequest){        request = new XMLHttpRequest();    } else if (window.ActiveXObject){        request=new ActiveXObject("Msxml2.XMLHTTP");        if (! request){            request=new ActiveXObject("Microsoft.XMLHTTP");        }     }    //the request could still be null if neither ActiveXObject    //initializations succeeded    if(request){       initReq(reqType,url,asynch);    }  else {        alert("Your browser does not permit the use of all "+        "of this application's features!");}}function setQueryString(){    queryString="";    var frm = document.forms[0];    var numberElements =  frm.elements.length;    for(var i = 0; i < numberElements; i++)  {            if(i < numberElements-1)  {                queryString += frm.elements[i].name+"="+                               encodeURIComponent(frm.elements[i].value)+"&";            } else {                queryString += frm.elements[i].name+"="+                               encodeURIComponent(frm.elements[i].value);            }    }}