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;

}



// Send a post form to the server using XMLHttpRequest.

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;

}



// Open a new window.

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 so the click won't follow the link ;).

	return false;

}



// Remember the current position.

function storeCaret(text)

{

	// Only bother if it will be useful.

	if (typeof(text.createTextRange) != "undefined")

		text.caretPos = document.selection.createRange().duplicate();

}



// Replaces the currently selected text with the passed text.

function replaceText(text, textarea)

{

	// Attempt to create a text range (IE).

	if (typeof(textarea.caretPos) != "undefined" && textarea.createTextRange)

	{

		var caretPos = textarea.caretPos;



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

		caretPos.select();

	}

	// Mozilla text range replace.

	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;

	}

	// Just put it on the end.

	else

	{

		textarea.value += text;

		textarea.focus(textarea.value.length - 1);

	}

}



// Surrounds the selected text with text1 and text2.

function surroundText(text1, text2, textarea)

{

	// Can a text range be created?

	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);

	}

	// Mozilla text range wrap.

	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;

	}

	// Just put them on the end, then.

	else

	{

		textarea.value += text1 + text2;

		textarea.focus(textarea.value.length - 1);

	}

}



// 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;

}



// Set the "inside" HTML of an element.

function setInnerHTML(element, toValue)

{

	// IE has this built in...

	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));

	}

}



// Set the "outer" HTML of an element.

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);

	}

}



// Get the inner HTML of an 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)

	{

	// An element.

	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;



	// 2 is an attribute.



	// Just some text..

	case 3:

		str += node.nodeValue;

		break;



	// A CDATA section.

	case 4:

		str += '<![CDATA' + '[' + node.nodeValue + ']' + ']>';

		break;



	// Entity reference..

	case 5:

		str += '&' + node.nodeName + ';';

		break;



	// 6 is an actual entity, 7 is a PI.



	// Comment.

	case 8:

		str += '<!--' + node.nodeValue + '-->';

		break;

	}



	return str;

}



// Checks for variable in theArray.

function in_array(variable, theArray)

{

	for (var i = 0; i < theArray.length; i++)

	{

		if (theArray[i] == variable)

			return true;

	}

	return false;

}



// Find a specific radio button in its group and select it.

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;

}



// Invert all checkboxes at once by clicking a single checkbox.

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;

	}

}



// Keep the session alive - always!

var lastKeepAliveCheck = new Date().getTime();

function smf_sessionKeepAlive()

{

	var curTime = new Date().getTime();



	// Prevent a Firefox bug from hammering the server.

	if (smf_scripturl && curTime - lastKeepAliveCheck > 900000)

	{

		var tempImage = new Image();

		tempImage.src = smf_scripturl + (smf_scripturl.indexOf("?") == -1 ? "?" : "&") + "action=keepalive;" + curTime;

		lastKeepAliveCheck = curTime;

	}



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

}

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



// Set a theme option through javascript.

function smf_setThemeOption(option, value, theme, cur_session_id)

{

	// Compatibility.

	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)

{

	// Compatibility.

	if (cur_session_id == null)

		cur_session_id = smf_session_id;



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

		return;

	// Are they using an email address?

	if (doForm.user.value.indexOf("@") != -1)

		return;



	// Unless the browser is Opera, the password will not save properly.

	if (typeof(window.opera) == "undefined")

		doForm.passwrd.autocomplete = "off";



	doForm.hash_passwrd.value = hex_sha1(hex_sha1(doForm.user.value.php_to8bit().php_strtolower() + doForm.passwrd.value.php_to8bit()) + cur_session_id);



	// It looks nicer to fill it with asterisks, but Firefox will try to save that.

	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)

{

	// Compatibility.

	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, "*");

}



function ajax_indicator(turn_on)

{

	var indicator = document.getElementById("ajax_in_progress");

	if (indicator != null)

	{

		if (navigator.appName == "Microsoft Internet Explorer" && navigator.userAgent.indexOf("MSIE 7") == -1)

		{

			indicator.style.top = document.documentElement.scrollTop;

		}

		indicator.style.display = turn_on ? "block" : "none";

	}

}