var smf_formSubmitted = false;

if (typeof(document.getElementById) == "undefined")
	document.getElementById = function (id)
	{
		return document.all[id];
	}
else if (!window.XMLHttpRequest && window.ActiveXObject)
	window.XMLHttpRequest = function ()
	{
		return new ActiveXObject(navigator.userAgent.indexOf("MSIE 5") != -1 ? "Microsoft.XMLHTTP" : "MSXML2.XMLHTTP");
	};

if (typeof(document.forms) == "undefined")
	document.forms = document.getElementsByTagName("form");

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;
}

function sendXMLDocument(url, content, callback)
{
	if (!window.XMLHttpRequest)
		return false;

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

			if (sendDoc.responseXML != null && sendDoc.status == 200)
				callback(sendDoc.responseXML);
			else
				callback(false);
		};
	}
	sendDoc.open('POST', url, true);
	if (typeof(sendDoc.setRequestHeader) != "undefined")
		sendDoc.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	sendDoc.send(content);

	return true;
}

function textToEntities(text)
{
	var entities = "";
	for (var i = 0; i < text.length; i++)
	{
		if (text.charCodeAt(i) > 127)
			entities += "&#" + text.charCodeAt(i) + ";";
		else
			entities += text.charAt(i);
	}

	return entities;
}

function reqWin(desktopURL, alternateWidth, alternateHeight, noScrollbars)
{
	if ((alternateWidth && self.screen.availWidth * 0.8 < alternateWidth) || (alternateHeight && self.screen.availHeight * 0.8 < alternateHeight))
	{
		noScrollbars = false;
		alternateWidth = Math.min(alternateWidth, self.screen.availWidth * 0.8);
		alternateHeight = Math.min(alternateHeight, self.screen.availHeight * 0.8);
	}
	else
		noScrollbars = typeof(noScrollbars) != "undefined" && noScrollbars == true;

	window.open(desktopURL, 'requested_popup', 'toolbar=no,location=no,status=no,menubar=no,scrollbars=' + (noScrollbars ? 'no' : 'yes') + ',width=' + (alternateWidth ? alternateWidth : 480) + ',height=' + (alternateHeight ? alternateHeight : 220) + ',resizable=no');

	return false;
}

function storeCaret(text)
{
	if (typeof(text.createTextRange) != "undefined")
		text.caretPos = document.selection.createRange().duplicate();
}

function replaceText(text, textarea)
{
	if (typeof(textarea.caretPos) != "undefined" && textarea.createTextRange)
	{
		var caretPos = textarea.caretPos;

		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text + ' ' : text;
		caretPos.select();
	}
	else if (typeof(textarea.selectionStart) != "undefined")
	{
		var begin = textarea.value.substr(0, textarea.selectionStart);
		var end = textarea.value.substr(textarea.selectionEnd);
		var scrollPos = textarea.scrollTop;

		textarea.value = begin + text + end;

		if (textarea.setSelectionRange)
		{
			textarea.focus();
			textarea.setSelectionRange(begin.length + text.length, begin.length + text.length);
		}
		textarea.scrollTop = scrollPos;
	}
	else
	{
		textarea.value += text;
		textarea.focus(textarea.value.length - 1);
	}
}

function surroundText(text1, text2, textarea)
{
	if (typeof(textarea.caretPos) != "undefined" && textarea.createTextRange)
	{
		var caretPos = textarea.caretPos, temp_length = caretPos.text.length;

		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text1 + caretPos.text + text2 + ' ' : text1 + caretPos.text + text2;

		if (temp_length == 0)
		{
			caretPos.moveStart("character", -text2.length);
			caretPos.moveEnd("character", -text2.length);
			caretPos.select();
		}
		else
			textarea.focus(caretPos);
	}
	else if (typeof(textarea.selectionStart) != "undefined")
	{
		var begin = textarea.value.substr(0, textarea.selectionStart);
		var selection = textarea.value.substr(textarea.selectionStart, textarea.selectionEnd - textarea.selectionStart);
		var end = textarea.value.substr(textarea.selectionEnd);
		var newCursorPos = textarea.selectionStart;
		var scrollPos = textarea.scrollTop;

		textarea.value = begin + text1 + selection + text2 + end;

		if (textarea.setSelectionRange)
		{
			if (selection.length == 0)
				textarea.setSelectionRange(newCursorPos + text1.length, newCursorPos + text1.length);
			else
				textarea.setSelectionRange(newCursorPos, newCursorPos + text1.length + selection.length + text2.length);
			textarea.focus();
		}
		textarea.scrollTop = scrollPos;
	}
	else
	{
		textarea.value += text1 + text2;
		textarea.focus(textarea.value.length - 1);
	}
}

function isEmptyText(theField)
{
	var theValue = theField.value;

	while (theValue.length > 0 && (theValue.charAt(0) == ' ' || theValue.charAt(0) == '\t'))
		theValue = theValue.substring(1, theValue.length);
	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;
}

function submitonce(theform)
{
	smf_formSubmitted = true;
}
function submitThisOnce(form)
{
	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;
}

function setInnerHTML(element, toValue)
{
	if (typeof(element.innerHTML) != 'undefined')
		element.innerHTML = toValue;
	// Otherwise, try createContextualFragment().
	else
	{
		var range = document.createRange();
		range.selectNodeContents(element);
		range.deleteContents();
		element.appendChild(range.createContextualFragment(toValue));
	}
}

function setOuterHTML(element, toValue)
{
	if (typeof(element.outerHTML) != 'undefined')
		element.outerHTML = toValue;
	else
	{
		var range = document.createRange();
		range.setStartBefore(element);
		element.parentNode.replaceChild(range.createContextualFragment(toValue), element);
	}
}

function getInnerHTML(element)
{
	if (typeof(element.innerHTML) != 'undefined')
		return element.innerHTML;
	else
	{
		var returnStr = '';
		for (var i = 0; i < element.childNodes.length; i++)
			returnStr += getOuterHTML(element.childNodes[i]);

		return returnStr;
	}
}

function getOuterHTML(node)
{
	if (typeof(node.outerHTML) != 'undefined')
		return node.outerHTML;

	var str = '';

	switch (node.nodeType)
	{
	case 1:
		str += '<' + node.nodeName;

		for (var i = 0; i < node.attributes.length; i++)
		{
			if (node.attributes[i].nodeValue != null)
				str += ' ' + node.attributes[i].nodeName + '="' + node.attributes[i].nodeValue + '"';
		}

		if (node.childNodes.length == 0 && in_array(node.nodeName.toLowerCase(), ['hr', 'input', 'img', 'link', 'meta', 'br']))
			str += ' />';
		else
			str += '>' + getInnerHTML(node) + '</' + node.nodeName + '>';
		break;


	case 3:
		str += node.nodeValue;
		break;

	case 4:
		str += '<![CDATA' + '[' + node.nodeValue + ']' + ']>';
		break;

	case 5:
		str += '&' + node.nodeName + ';';
		break;


	case 8:
		str += '<!--' + node.nodeValue + '-->';
		break;
	}

	return str;
}

function in_array(variable, theArray)
{
	for (var i = 0; i < theArray.length; i++)
	{
		if (theArray[i] == variable)
			return true;
	}
	return false;
}

function selectRadioByName(radioGroup, name)
{
	if (typeof(radioGroup.length) == "undefined")
		return radioGroup.checked = true;

	for (var i = 0; i < radioGroup.length; i++)
	{
		if (radioGroup[i].value == name)
			return radioGroup[i].checked = true;
	}

	return false;
}

function invertAll(headerfield, checkform, mask)
{
	for (var i = 0; i < checkform.length; i++)
	{
		if (typeof(checkform[i].name) == "undefined" || (typeof(mask) != "undefined" && checkform[i].name.substr(0, mask.length) != mask))
			continue;

		if (!checkform[i].disabled)
			checkform[i].checked = headerfield.checked;
	}
}

function smf_sessionKeepAlive()
{
	var tempImage = new Image();
	if (smf_scripturl)
		tempImage.src = smf_scripturl + (smf_scripturl.indexOf("?") == -1 ? "?" : "&") + "action=keepalive;" + (new Date().getTime());

	window.setTimeout("smf_sessionKeepAlive();", 1200000);
}
window.setTimeout("smf_sessionKeepAlive();", 1200000);

function smf_setThemeOption(option, value, theme, cur_session_id)
{
	if (cur_session_id == null)
		cur_session_id = smf_session_id;

	var tempImage = new Image();
	tempImage.src = smf_scripturl + (smf_scripturl.indexOf("?") == -1 ? "?" : "&") + "action=jsoption;var=" + option + ";val=" + value + ";sesc=" + cur_session_id + (theme == null ? "" : "&id=" + theme) + ";" + (new Date().getTime());
}

function smf_avatarResize()
{
	var possibleAvatars = document.getElementsByTagName ? document.getElementsByTagName("img") : document.all.tags("img");

	for (var i = 0; i < possibleAvatars.length; i++)
	{
		if (possibleAvatars[i].className != "avatar")
			continue;

		var tempAvatar = new Image();
		tempAvatar.src = possibleAvatars[i].src;

		if (smf_avatarMaxWidth != 0 && tempAvatar.width > smf_avatarMaxWidth)
		{
			possibleAvatars[i].height = (smf_avatarMaxWidth * tempAvatar.height) / tempAvatar.width;
			possibleAvatars[i].width = smf_avatarMaxWidth;
		}
		else if (smf_avatarMaxHeight != 0 && tempAvatar.height > smf_avatarMaxHeight)
		{
			possibleAvatars[i].width = (smf_avatarMaxHeight * tempAvatar.width) / tempAvatar.height;
			possibleAvatars[i].height = smf_avatarMaxHeight;
		}
		else
		{
			possibleAvatars[i].width = tempAvatar.width;
			possibleAvatars[i].height = tempAvatar.height;
		}
	}

	if (typeof(window_oldAvatarOnload) != "undefined" && window_oldAvatarOnload)
	{
		window_oldAvatarOnload();
		window_oldAvatarOnload = null;
	}
}

function hashLoginPassword(doForm, cur_session_id)
{
	if (cur_session_id == null)
		cur_session_id = smf_session_id;

	if (typeof(hex_sha1) == "undefined")
		return;
	if (doForm.user.value.indexOf("@") != -1)
		return;

	if (typeof(window.opera) == "undefined")
		doForm.passwrd.autocomplete = "off";

	doForm.hash_passwrd.value = hex_sha1(hex_sha1(doForm.user.value.toLowerCase() + doForm.passwrd.value) + cur_session_id);

	if (navigator.userAgent.indexOf("Firefox/") != -1)
		doForm.passwrd.value = "";
	else
		doForm.passwrd.value = doForm.passwrd.value.replace(/./g, "*");
}

function hashAdminPassword(doForm, username, cur_session_id)
{
	if (cur_session_id == null)
		cur_session_id = smf_session_id;

	if (typeof(hex_sha1) == "undefined")
		return;

	doForm.admin_hash_pass.value = hex_sha1(hex_sha1(username.toLowerCase() + doForm.admin_pass.value) + cur_session_id);
	doForm.admin_pass.value = doForm.admin_pass.value.replace(/./g, "*");
}