function myHTTP() {
	this.httpObject = myHTTP.prototype.getHTTPObject();
}

// CREATE HTTP OBJECT- getHTTPObject()
// RETURNS: HTTP OBJECT

myHTTP.prototype.getHTTPObject = function() {
	if (window.ActiveXObject)
		return new ActiveXObject("Microsoft.XMLHTTP");
	else if (window.XMLHttpRequest)
		return new XMLHttpRequest();
	else {
		alert("Your browser does not support the necessary version of Javascript to display this page. Please try a newer browser.");
		return null;
	}
}

// SYNCHRONOUS REQUEST- getSync(url)
// INPUT: URL
// RETURNS: HTTP RESPONSE TEXT
myHTTP.prototype.getSync = function(url) {
	if (this.httpObject == null)
		return;

	this.httpObject.open('GET', url, false);
	this.httpObject.send(null);
	if (this.httpObject.status == 200)
		return this.httpObject.responseText;
}

// SYNCHRONOUS REQUEST USING POST- getSyncPost(url)
// INPUT: URL
// RETURNS: HTTP RESPONSE TEXT
myHTTP.prototype.getSyncPost = function(url, queryString) {
	if (this.httpObject == null)
		return;

	this.httpObject.open('POST', url, false);
	this.httpObject.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
   this.httpObject.send(queryString);

	if (this.httpObject.status == 200)
		return this.httpObject.responseText;
}

/* AJAX SEND FORM DATA AS POST
******************************/

function getQueryString(form_name) {
	var queryString='';
	var frm = document.getElementById(form_name);
	var numberElements = frm.elements.length;
	for(var i=0; i<numberElements; i++) {
		switch(frm.elements[i].type) {
			case 'checkbox': // SKIP NOT CHECKED
				if (!frm.elements[i].checked)
					continue;
			break;
			case 'radio': // SKIP NOT SELECTED
				if (!frm.elements[i].checked)
					continue;
			break;
			default:
			break;
		}
		queryString += frm.elements[i].name+'='+encodeURIComponent(frm.elements[i].value)+'&';
	}

	return queryString.substr(0,queryString.length-1); // TRIM OFF LAST '&'
}

/* *******************************************************
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
********************************************************* */
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};