function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http = createRequestObject();

function expand(cid, did) {		//for showing persons who downloaded files for a particular country
    http.open('get', '_dlog.php?cid='+cid+'&did='+did);
    http.onreadystatechange = handleResponse;
	var hide = '<a class=toggle href=javascript:hide('+cid+','+did+')>&#8211;</a>';
	var id = 'collapse_'+cid+did;
	document.getElementById(id).innerHTML = hide;
    http.send(null);
}

function navcal(yr, mth) {	//for navigating the calendar between months
    http.open('get', '_bcal.php?y='+yr+'&m='+mth);
    http.onreadystatechange = handleResponse;
    http.send(null);
}

function handleResponse() {
    if(http.readyState == 4){
        var response = http.responseText;
        var update = new Array();

        if(response.indexOf('|' != -1)) {
            update = response.split('|');
            document.getElementById(update[0]).innerHTML = update[1];
        }
    }
}
function hide(cid, did) {		//for resetting the <div> tag to nothing
	document.getElementById(cid).innerHTML = "";
	var expand = '<a class=toggle href=javascript:expand('+cid+','+did+')>+</a>';
	var id = 'collapse_'+cid+did;
	document.getElementById(id).innerHTML = expand;
}