function prepareRequest() {
    var http_request = false;
    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            // See note below about this line
        }
    } else if (window.ActiveXObject) { // IE
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    }
    if (!http_request) {
      alert('Браузер не поддерживает AJAX'); return false;
    }
	return http_request;
}

function loadHTTP(url){
	req = prepareRequest();
	req.onreadystatechange = function() {alertContents(req, ''); }
    req.open("GET", url, true);
	req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=windows-1251');
	req.send(null);
	reqTimeout = setTimeout("req.abort();", 5000);
}

function alertContents(req) {
	var PickText, prevDiv;
  if (req.readyState == 4) {
  	clearTimeout(reqTimeout);
    if (req.status == 200) {
        alert(req.responseText);
    } 
	}
}