var http_request = false;
function makeRequest(url, param, parameters) {

http_request = false;
if (window.XMLHttpRequest) { // Mozilla, Safari,...
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
// set type accordingly to anticipated content type
//http_request.overrideMimeType('text/xml');
http_request.overrideMimeType('text/html');
}
} 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('Cannot create XMLHTTP instance');
return false;
}
//alert (url + "?"+parameters);
http_request.onreadystatechange = alertContents;
http_request.open('GET', url + "?"+parameters, true);
http_request.send(null);
}

function alertContents() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
//alert(http_request.responseText);
result = http_request.responseText;
document.getElementById('myspan').innerHTML = result;
} else {
alert('There was a problem with the request.');
//alert (url + "?"+parameters);
}
}
}

function get(obj,url,param) {
var getstr = "?";
for (i=0; i<obj.childNodes.length; i++) {
if (obj.childNodes[i].tagName == "INPUT") {
if (obj.childNodes[i].type == "text") {
getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";
}
if (obj.childNodes[i].type == "hidden") {
getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";
}
if (obj.childNodes[i].type == "checkbox") {
if (obj.childNodes[i].checked) {
getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";
} else {
getstr += obj.childNodes[i].name + "=&";
}
}
if (obj.childNodes[i].type == "radio") {
if (obj.childNodes[i].checked) {
getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";
}
}
}
if (obj.childNodes[i].tagName == "SELECT") {
var sel = obj.childNodes[i];
getstr += sel.name + "=" + sel.options[sel.selectedIndex].value + "&";
}

if (obj.childNodes[i].tagName == "BUTTON") {
getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";
}


}
makeRequest(url+'.php', getstr,param);
}