function GetHTTP()
{
    var httpRequest;

    if(document.all) {
      httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else {
      httpRequest = new XMLHttpRequest();
    }
     return(httpRequest);
}

function login()
{
	httpRequest = GetHTTP();
	var username = document.getElementById('usernameInput').value;
	var password = document.getElementById('passwordInput').value;
	
	httpRequest.open('GET','/investigators-site/dummy.dat', false, username, password);
	httpRequest.send(null);
	
	if(httpRequest.status == 401) {
		document.getElementById('passwordInput').value = '';
		document.getElementById('usernameInput').value = '';
		document.getElementById('loginError').style.display = 'block';
	}
	else this.location="/investigators-site/filtrexx.cgi?home.frm";
}

// http://jennifermadden.com/javascript/stringEnterKeyDetector.html
function checkEnter(e)
{
	var characterCode;
	if(e && e.which) { e = e; characterCode = e.which; }
	else { e = event; characterCode = e.keyCode; }

	if(characterCode == 13) login();
}