var smf_formSubmitted = false;

// Define document.getElementById for Internet Explorer 4.
if (typeof(document.getElementById) == "undefined")
	document.getElementById = function (id)
	{
		// Just return the corresponding index of all.
		return document.all[id];
	}
// Define XMLHttpRequest for IE 5 and above. (don't bother for IE 4 :/.... works in Opera 7.6 and Safari 1.2!)
else if (!window.XMLHttpRequest && window.ActiveXObject)
	window.XMLHttpRequest = function ()
	{
		return new ActiveXObject(navigator.userAgent.indexOf("MSIE 5") != -1 ? "Microsoft.XMLHTTP" : "MSXML2.XMLHTTP");
	};

// Some older versions of Mozilla don't have this, for some reason.
if (typeof(document.forms) == "undefined")
	document.forms = document.getElementsByTagName("form");

// Load an XML document using XMLHttpRequest.
function getXMLDocument(url, callback)
{
	if (!window.XMLHttpRequest)
		return false;

	var myDoc = new XMLHttpRequest();
	if (typeof(callback) != "undefined")
	{
		myDoc.onreadystatechange = function ()
		{
			if (myDoc.readyState != 4)
				return;

			if (myDoc.responseXML != null && myDoc.status == 200)
				callback(myDoc.responseXML);
		};
	}
	myDoc.open('GET', url, true);
	myDoc.send(null);

	return true;
}



// Checks if the passed input's value is nothing.
function isEmptyText(theField)
{
	// Copy the value so changes can be made..
	var theValue = theField.value;

	// Strip whitespace off the left side.
	while (theValue.length > 0 && (theValue.charAt(0) == ' ' || theValue.charAt(0) == '\t'))
		theValue = theValue.substring(1, theValue.length);
	// Strip whitespace off the right side.
	while (theValue.length > 0 && (theValue.charAt(theValue.length - 1) == ' ' || theValue.charAt(theValue.length - 1) == '\t'))
		theValue = theValue.substring(0, theValue.length - 1);

	if (theValue == '')
		return true;
	else
		return false;
}

// Only allow form submission ONCE.
function submitonce(theform)
{
	smf_formSubmitted = true;
}
function submitThisOnce(form)
{
	// Hateful, hateful fix for Safari 1.3 beta.
	if (navigator.userAgent.indexOf('AppleWebKit') != -1)
		return !smf_formSubmitted;

	if (typeof(form.form) != "undefined")
		form = form.form;

	for (var i = 0; i < form.length; i++)
		if (typeof(form[i]) != "undefined" && form[i].tagName.toLowerCase() == "textarea")
			form[i].readOnly = true;

	return !smf_formSubmitted;
}