/* 
 * Cross-browser event handling, by Scott Andrew
 */
function addEvent(element, eventType, lamdaFunction, useCapture) {
    if (element.addEventListener) {
        element.addEventListener(eventType, lamdaFunction, useCapture);
        return true;
    } else if (element.attachEvent) {
        var r = element.attachEvent('on' + eventType, lamdaFunction);
        return r;
    } else {
        return false;
    }
}

/* 
 * Kills an event's propagation and default action
 */
function knackerEvent(eventObject) {
    if (eventObject && eventObject.stopPropagation) {
        eventObject.stopPropagation();
    }
    if (window.event && window.event.cancelBubble ) {
        window.event.cancelBubble = true;
    }
    
    if (eventObject && eventObject.preventDefault) {
        eventObject.preventDefault();
    }
    if (window.event) {
        window.event.returnValue = false;
    }
}

/* 
 * Safari doesn't support canceling events in the standard way, so we must
 * hard-code a return of false for it to work.
 */
function cancelEventSafari() {
    return false;        
}

/* 
 * Cross-browser style extraction, from the JavaScript & DHTML Cookbook
 * <http://www.oreillynet.com/pub/a/javascript/excerpt/JSDHTMLCkbk_chap5/index5.html>
 */
function getElementStyle(elementID, CssStyleProperty) {
    var element = document.getElementById(elementID);
    if (element.currentStyle) {
        return element.currentStyle[toCamelCase(CssStyleProperty)];
    } else if (window.getComputedStyle) {
        var compStyle = window.getComputedStyle(element, '');
        return compStyle.getPropertyValue(CssStyleProperty);
    } else {
        return '';
    }
}

/* 
 * CamelCases CSS property names. Useful in conjunction with 'getElementStyle()'
 * From <http://dhtmlkitchen.com/learn/js/setstyle/index4.jsp>
 */
function toCamelCase(CssProperty) {
    var stringArray = CssProperty.toLowerCase().split('-');
    if (stringArray.length == 1) {
        return stringArray[0];
    }
    var ret = (CssProperty.indexOf("-") == 0)
              ? stringArray[0].charAt(0).toUpperCase() + stringArray[0].substring(1)
              : stringArray[0];
    for (var i = 1; i < stringArray.length; i++) {
        var s = stringArray[i];
        ret += s.charAt(0).toUpperCase() + s.substring(1);
    }
    return ret;
}

/*
 * Disables all 'test' links, that point to the href '#', by Ross Shannon
 */
function disableTestLinks() {
  var pageLinks = document.getElementsByTagName('a');
  for (var i=0; i<pageLinks.length; i++) {
    if (pageLinks[i].href.match(/[^#]#$/)) {
      addEvent(pageLinks[i], 'click', knackerEvent, false);
    }
  }
}

/* 
 * Cookie functions
 */
function createCookie(name, value, days) {
    var expires = '';
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days*24*60*60*1000));
        var expires = '; expires=' + date.toGMTString();
    }
    document.cookie = name + '=' + value + expires + '; path=/';
}

function readCookie(name) {
    var cookieCrumbs = document.cookie.split(';');
    var nameToFind = name + '=';
    for (var i = 0; i < cookieCrumbs.length; i++) {
        var crumb = cookieCrumbs[i];
        while (crumb.charAt(0) == ' ') {
            crumb = crumb.substring(1, crumb.length); /* delete spaces */
        }
        if (crumb.indexOf(nameToFind) == 0) {
            return crumb.substring(nameToFind.length, crumb.length);
        }
    }
    return null;
}

function eraseCookie(name) {
    createCookie(name, '', -1);
}




/*
 * Toggle div visibility onClick
 */

function switchMenu(obj) {
var el = document.getElementById(obj);
if ( el.style.display != 'none' ) {
el.style.display = 'none';
}
else {
el.style.display = 'block';
}
}


/* Admin Text Helper */
var canFormat = 1;

function dirify (str) {
    var s = str.toLowerCase();
    s = s.replace(/&[^;\s]+;/g, '');
    s = s.replace(/[^\w\s]/g, '');
    s = s.replace(/\s+/g, '_');
    return s;
}

function getSelected (e) {
    if (document.selection) {
        e.focus();
        var range = document.selection.createRange();
        return range.text;
    } else {
        var length = e.textLength;
	if (length == undefined) return;
        var start = e.selectionStart;
        var end = e.selectionEnd;
        if (end == 1 || end == 2) end = length;
        return e.value.substring(start, end);
    }
}

function setSelection (e, v) {
    if (document.selection) {
        e.focus();
        var range = document.selection.createRange();
        range.text = v;
    } else {
        var length = e.textLength;
        var start = e.selectionStart;
        var end = e.selectionEnd;
        if (end == 1 || end == 2) end = length;
        e.value = e.value.substring(0, start) + v + e.value.substr(end, length);
        e.selectionStart = start + v.length;
        e.selectionEnd = start + v.length;
    }
    e.focus();
}

function formatStr (e, v) {
    var str = getSelected(e);
    if (!str) return;
    setSelection(e, '<' + v + '>' + str + '</' + v + '>');
    return false;
}

createRange = function( selection, element )
{
	var doc = TC.getOwnerDocument( element );
	if( selection && selection.getRangeAt )
		return selection.getRangeAt( 0 );
	else if( selection && selection.createRange )
		return selection.createRange();
	else if( doc.createRange )
		return doc.createRange();
	return null;
}


/* Switch visibility of objects */

function display_switch(object) {
  if (object.style.display == "none") {
    object.style.display = "block";
  } else {
    object.style.display = "none";
  }
}

function gebid(id) {
  return document.getElementById(id);
}

function display_show(a,b) {
  display_switch(gebid(a));
  display_switch(gebid(b));
}