var http_request = new Array();
var span_target = new Array();
function makePOSTRequest(target,url, parameters,show_loading,request_number,success_callback) {
	if (typeof request_number == 'undefined' ) {
		request_number = 0;
	}
	if (typeof show_loading == 'undefined' ) {
		show_loading = 1;
	}
	http_request[request_number] = new Array();
	http_request[request_number][0] = false;
	http_request[request_number][1] = target;
	
	if(show_loading == 1) {
		document.getElementById(http_request[request_number][1]).innerHTML = '<div style="float:left;width:100%;text-align:center">Loading</div>'; //<img src=images/loading-animation.gif>
	}
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request[request_number][0] = new XMLHttpRequest();
		if (http_request[request_number][0].overrideMimeType) {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request[request_number][0].overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request[request_number][0] = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request[request_number][0] = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request[request_number][0]) {
		alert('Cannot create XMLHTTP instance');
		return false;
	}
	http_request[request_number][0].onreadystatechange = alertContents;
	http_request[request_number][0].open('POST', url, true);
	http_request[request_number][0].setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_request[request_number][0].setRequestHeader("Content-length", parameters.length);
	http_request[request_number][0].setRequestHeader("Connection", "close");
	http_request[request_number][0].send(parameters);
}

function alertContents() {
	for(i=0;i<http_request.length;i++) {
		if (http_request[i] != null && http_request[i][0].readyState == 4) {
			if (http_request[i][0].status == 200) {
				//alert(http_request.responseText);
				result = http_request[i][0].responseText;
				document.getElementById(http_request[i][1]).innerHTML = result;            
				http_request[i] = null;
			} else {
				alert('There was a problem with the request.');
			}
		}
	}
}