function ajax(exec, strURL) {
    var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    self.xmlHttpReq.open('GET', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=windows-1251');
	self.xmlHttpReq.onreadystatechange = 
		function() {
			if (self.xmlHttpReq.readyState == 4) {
				ret = self.xmlHttpReq.responseText;
				setTimeout(exec+"('"+ret+"');", 0);
				return;
			}
		}
    self.xmlHttpReq.send("keepalive=1");
	return;
}

function ajax_page(url){ ajax("updatepage", url); }

function updatepage(nc){ document.all.pagecontent.innerHTML = nc; }