var req=null;
var READY_STATE_COMPLETE=4;

function sendReq(url, callback) {
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
    }
    if (req) {
        req.onreadystatechange = callback;
        req.open("GET", url, true);
        req.send(null);
    }
}

function pointerOn () { 
	document.body.style.cursor = "pointer"; 
}

function pointerOff () { 
	document.body.style.cursor = "default"; 
}