// JavaScript Document

function isEmail(text)
{
	var emailFormat = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
	if ( emailFormat.test(text) )
		return true;
	else
		return false;
}

//----------------------------------------------------> http_request part
var http_request = false;
var _function_when_complete = null;

function makeRequest(run_this_function_when_complete,url)
{
    http_request = false;
    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml'); 
        }
    }
	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('Giving up  :(  Cannot create an XMLHTTP instance');
        return false;
    }
	_function_when_complete = run_this_function_when_complete;
    http_request.onreadystatechange = _alertfunction_;
    http_request.open('POST', url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded;charset=utf-8");
	http_request.send(null);
}

function _alertfunction_()
{
    if (http_request.readyState == 4) {//4 = complete
        if (http_request.status == 200) {
			if ( _function_when_complete )
				_function_when_complete();
        }
		else {
            alert('There was a problem with the request.');
        }
    }
}
//<---------------------------------------------------- http_request part