window.onload=function(){    var sts = document.getElementById("sts");    sts.onclick=function(){        var cit = document.getElementById("city");        if(cit.value) {getZipcode(cit.value,sts.value.toUpperCase());}    };};function getZipcode(_ct,_st){    if(_ct.length > 0 && _st.length > 0){        httpRequest("GET","http://www.parkerriver.com/s/zip?city="+                          encodeURIComponent(_ct)+"&state="+                          encodeURIComponent(_st),                true,handleResponse);    } else {        document.getElementById("zip5").value="";    }}function handleResponse(){    var xmlReturnVal;    try{         if(request.readyState == 4){            if(request.status == 200){                xmlReturnVal=request.responseXML;                if(xmlReturnVal != null)  {                    var zip5=xmlReturnVal.getElementsByTagName("zip")[0];                    if(zip5 && zip5.childNodes.length > 0) {                        document.getElementById("zip5").value=zip5.childNodes[0].data;                    }                }            } else {                //request.status is 503                //if the application isn't available;                //500 if the application has a bug                alert(                        "A problem occurred with communicating between"+                        " the XMLHttpRequest object and the server program.");            }        }//end outer if    } catch (err)   {        alert("It does not appear that the server "+              "is available for this application. Please"+              " try again very soon. \nError: "+err.message);    }}