function clearText(objInputText, defaultText)
{
	if (defaultText == objInputText.value)
		objInputText.value = "";
}

function restoreText(objInputText, defaultText)
{
	if (objInputText.value == "")
		objInputText.value = defaultText;
}

function changeType(objInputText, newType)
{
	if (objInputText.value == "")
		objInputText.type = newType;
}

function isEnterKey(ev)
{
	var e = window.event ? window.event : ev;
	var iKeyCode = e.keyCode; // ? e.keyCode: e.charCode;
	
	return (iKeyCode == 13);
}

var _previousLanguageId = 0;

function setCurrentLanguageId(currentLanguageId)
{
	_previousLanguageId = currentLanguageId;
}

function showLanguageTab(currentLanguageId)
{
	var element = document.getElementById("langDiv_" + _previousLanguageId);
	if (element != null)
		element.style.display = "none";
		
	element = document.getElementById("langLink_" + _previousLanguageId);
	if (element != null)
		element.className = "language_link";

	_previousLanguageId = currentLanguageId;
	
	element = document.getElementById("langDiv_" + currentLanguageId);
	if (element != null)
		element.style.display = "block";
		
	element = document.getElementById("langLink_" + currentLanguageId);
	if (element != null)
		element.className = "language_link_selected";
		
	
}

function toggleDisplay(elementId)
{
	var element = document.getElementById(elementId);
	if (element != null)
	{
		if (element.style.display == "none")
			element.style.display = "block";
		else
			element.style.display = "none";
	}
}

function showElement(elementId)
{
	var element = document.getElementById(elementId);
	if (element != null)
		element.style.display = "block";
}

function hideElement(elementId)
{
	var element = document.getElementById(elementId);
	if (element != null)
		element.style.display = "none";
}

function openPage(pageUrl, pageTitle)
{
	var mywindow = window.open (pageUrl, pageTitle, "location=1,status=1,scrollbars=1, width=800,height=600");
	mywindow.moveTo(0,0);
}

function limitTextarea(inputId, maxChars, outputId)
{
	var inputArea = document.getElementById(inputId);
	var outputField = document.getElementById(outputId);

	if (inputArea != null && outputField != null)
	{
		var userText = inputArea.value;
		var textLength = userText.length;
		var charsRemaining = maxChars - textLength;
		if (charsRemaining < 0) charsRemaining = 0;

		if (textLength > maxChars)
		{
			userText = userText.substring(0,maxChars);
			inputArea.value = userText;
		}
		
		outputField.innerHTML = charsRemaining;
	}
}


function urlTitle(val)
{
	var replaceKey = '_';
	var searchKey = '-';
	var regex = "/[^a-z0-9" + replaceKey + "]";
	
	val = strip_tags(val.trim().toLowerCase(), "");
	
	val = val.replace(searchKey, replaceKey);
	val = val.replace(/\s+/gi, replaceKey);
	val = val.replace(regex, '');
	val = val.replace(replaceKey + "+", '');
	val = val.replace(replaceKey + "$", '');
	val = val.replace("^" + replaceKey, '');
	
//	$trans = array($search => $replace, "\s+" => $replace, "[^a-z0-9".$replace."]" => '',
//	$replace."+" => $replace, $replace."$" => '', "^".$replace => '');
	
	return stripslashes(val).trim();
}

function strip_tags(input, allowed) 
{
	allowed = (((allowed || "") + "")
              .toLowerCase()
              .match(/<[a-z][a-z0-9]*>/g) || [])
              .join(''); // making sure the allowed arg is a string containing only tags in lowercase (<a><b><c>)           
			  var tags = /<\/?([a-z][a-z0-9]*)\b[^>]*>/gi
              var commentsAndPhpTags = /<!--[\s\S]*?-->|<\?(?:php)?[\s\S]*?\?>/gi;
           return input.replace(commentsAndPhpTags, '').replace(tags, function($0, $1)
		   {
              return allowed.indexOf('<' + $1.toLowerCase() + '>') > -1 ? $0 : '';
           });
}

function stripslashes (str) 
{
    return (str+'').replace(/\\(.?)/g, function (s, n1) 
	{
        switch (n1) {
            case '\\':
                return '\\';
            case '0':
                return '\u0000';
            case '':
                return '';
            default:
                return n1;
        }
    });
}

function setUrlKey(textInputId, textOutputId)
{
	var textInput = document.getElementById(textInputId);
	var textOutput = document.getElementById(textOutputId);
	
	if (textInput != null && textOutput != null)
		textOutput.value = urlTitle(textInput.value, '');
}