/******************************************************************************
 *                                  FORMS                                     *
 ******************************************************************************/

var 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];
	}

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


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

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

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

	return !formSubmitted;
}




/******************************************************************************
 *                                 EDITOR                                     *
 ******************************************************************************/

// 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);
	}
}

function surroundTextList ( tag1, tag2, tag3, tag4, textarea )
{
    // Code for IE
	if (document.selection) 
    {
        textarea.focus();
        var sel = document.selection.createRange();
        var list = sel.text.split('\n');
        var postlist = new Array();
        var len = 0;
        var i;

        for(i=0;i<list.length;i++) 
        {
            len = list[i].length;
            if ( list[i].charCodeAt(len-1) == 13 ) // 13 = ascii code of '\r'
            {
                list[i] = list[i].substr(0,len-1);
            }
            if ( list[i].length > 0)
            {
                postlist.push ( tag3 + list[i] + tag4 );
            }
        }
        sel.text = tag1 + '\n' + postlist.join("\n") + '\n' + tag2;
    }

    // Code for Firefox
    else
    {
        var len = textarea.value.length;
        var start = textarea.selectionStart;
        var end = textarea.selectionEnd;
        var i;
        var scrollTop = textarea.scrollTop;
        var scrollLeft = textarea.scrollLeft;
        var sel = textarea.value.substring(start, end);
        var list = sel.split('\n');
        var postlist = new Array();

        for(i=0;i<list.length;i++) 
        {
            if ( list[i].length > 0 )
            {
                postlist.push ( tag3 + list[i] + tag4 );
            }
        }

        var rep = tag1 + '\n' + postlist.join("\n") + '\n' +tag2;
        textarea.value =  textarea.value.substring(0,start) + rep + textarea.value.substring(end,len);

        textarea.scrollTop = scrollTop;
        textarea.scrollLeft = scrollLeft;
    }
}


/******************************************************************************
 *                          INNER AND OUTER FUNCTIONS                         *
 ******************************************************************************/


// 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;
}




/******************************************************************************
 *                             OTHER FUNCTIONS                                *
 ******************************************************************************/

// 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;
	}
}

// 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;
}

// Change visibility state
function ChangeDisplayState( id )
{            
    var element = document.getElementById(id);
    
    if ( element.style.display == '' )
    {
         element.style.display = 'none';
    }
    else
    {
         element.style.display = '';
    }
}