function load_page(mainpage, htmlid, str_postvars) {
   /*
   var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
	*/
	var xmlHR_extendsession = false;
        if (window.XMLHttpRequest) { // Mozilla, Safari,...
            xmlHR_extendsession = new XMLHttpRequest();
            if (xmlHR_extendsession.overrideMimeType) {
                xmlHR_extendsession.overrideMimeType('text/xml');
            }
        } else if (window.ActiveXObject) { // IE
            try {
                xmlHR_extendsession = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    xmlHR_extendsession = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }
	
	
	if (!xmlHR_extendsession) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
    
	xmlHR_extendsession.open('POST', 'content.php', true);
    xmlHR_extendsession.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlHR_extendsession.onreadystatechange = function() {
		document.getElementById(htmlid).innerHTML = xmlHR_extendsession.responseText;
    }
    xmlHR_extendsession.send('page='+mainpage+'&'+str_postvars);
	
}