function GetXmlHttpObject() {
	try { return new XMLHttpRequest(); }
	catch (e) {
		try { 
			return new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			return new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return null;
}

function loadAjax(div_id, url, some_function, some_params) {
	var div = document.getElementById(div_id);
	if(div) {
		xmlHttp = GetXmlHttpObject();
		if (xmlHttp == null) {
			alert ("Your browser does not support AJAX!");
			return;
		}
		xmlHttp.onreadystatechange = function() { loadedAjax(div, some_function, some_params); };  
		xmlHttp.open("GET", url, true);
		xmlHttp.setRequestHeader('Content-Type', 'application/ajax+html');
		xmlHttp.send(null);
	} else {
		alert(div_id);
	}
	return false;
}

function loadedAjax(obj, some_function, some_params) {
	if (xmlHttp.readyState == 4) {
		obj.innerHTML = xmlHttp.responseText;
		if (some_function)
			some_function(xmlHttp.responseText, some_params);
	}
}

function formSerialize(form) {
	var serialized = "";
	for (i = 0; i<form.length; i++) {
		if(form[i].type) {
			if (form[i].type == "text" || form[i].type == "hidden" || form[i].type == "select-one") {
				serialized += form[i].name + "=" + form[i].value + "&";
			} else if (form[i].type == "checkbox") {
				if (form[i].checked) {
					serialized += form[i].name + "=" + form[i].value + "&";
				}
			}
		} else {
			serialized += form[i].name + "=" + form[i].value + "&";
		}
	}
	return serialized;	
}

function stringUnserialize(str) {
	var substr = str.split(";");
	var values = new Array();
	var j = 0;
	if (substr.length) {
		for (i = 0; i < substr.length; i++) {
			if (substr[i].length) {
				line = substr[i].split("=");
				if (line.length && line[0]){
					values[j] = new Array();
					values[j][0] = line[0];
					values[j][1] = line[1];
					j++;
				}
			}
		}
	} else {
		line = response.split("=");
		if (line.length && line[0]){
			values[j] = new Array();
			values[j][0] = line[0];
			values[j][1] = line[1];
			j++;
		}
	}
	return values;
}