// JavaScript Document for weather application

// WEATHER
// initialize XMLHttpRequest object
var xmlobj=null;
// initialize global variables
var data=new Array();
var i=0;
// send http request
function sendRequest(doc){
    // check for existing requests
    if(xmlobj!=null&&xmlobj.readyState!=0&&xmlobj.readyState!=4){
        xmlobj.abort();
    }
    try{
        // instantiate object for Firefox, Nestcape, etc.
        xmlobj=new XMLHttpRequest();
    }
    catch(e){
        try{
            // instantiate object for Internet Explorer
            xmlobj=new ActiveXObject('Microsoft.XMLHTTP');
        }
        catch(e){
            // Ajax is not supported by the browser
            xmlobj=null;
            return false;
        }
    }
    // assign state handler
    xmlobj.onreadystatechange=stateChecker;
    // open socket connection
    xmlobj.open('GET',doc,true);
    // send request
    xmlobj.send(null);
}
// check request status
function stateChecker(){
    // if request is completed
    if(xmlobj.readyState==4){
        // if status == 200 display text file
        if(xmlobj.status==200){
            // create data container
            createDataContainer();
            // display data into container
            data=xmlobj.responseText.split('\n');
            displayData();
        }
        else{
            alert('Failed to get response :'+ xmlobj.statusText);
        }
    }
}
// create data container
function createDataContainer(){
    var div=document.createElement('div');
    div.setAttribute('id','container');
      if(div.style){
        div.style.width='200px';
        document.getElementsByTagName('body')[0].appendChild(div);
    }
}