Firebug lite's useful helper methods condensed

functions.js

this.arrayInsert = function (array, index, other) {
  for (var i = 0; i < other.length; ++i) {
    array.splice(i + index, 0, other[i])
  }
  return array
};
this.createStyleSheet = function (doc, url) {
  var style = this.createElement("link");
  style.setAttribute("charset", "utf-8");
  style.setAttribute("rel", "stylesheet");
  style.setAttribute("type", "text/css");
  style.setAttribute("href", url);
  return style
};
this.addStyleSheet = function (doc, style) {
  var heads = doc.getElementsByTagName("head");
  if (heads.length) {
    heads[0].appendChild(style)
  } else {
    doc.documentElement.appendChild(style)
  }
};
this.getStyle = function (el, name) {
  return el.currentStyle[name] || el.style[name] || undefined
}
:
function (el, name) {
  return el.ownerDocument.defaultView.getComputedStyle(el, null)[name] || el.style[name] || undefined
};
this.escapeNewLines = function (value) {
  return value.replace(/\r/g, "\\r").replace(/\n/g, "\\n")
};
this.stripNewLines = function (value) {
  return typeof(value) == "string" ? value.replace(/[\r\n]/g, " ") : value
};
this.escapeJS = function (value) {
  return value.replace(/\r/g, "\\r").replace(/\n/g, "\\n").replace('"', '\\"', "g")
};
this.getChildByClass = function (node) {
  for (var i = 1; i < arguments.length; ++i) {
    var className = arguments[i];
    var child = node.firstChild;
    node = null;
    for (; child; child = child.nextSibling) {
      if (this.hasClass(child, className)) {
        node = child;
        break
      }
    }
  }
  return node
};
this.getAncestorByClass = function (node, className) {
  for (var parent = node; parent; parent = parent.parentNode) {
    if (this.hasClass(parent, className)) {
      return parent
    }
  }
  return null
};
this.getElementsByClass = function (node, className) {
  var result = [];
  for (var child = node.firstChild; child; child = child.nextSibling) {
    if (this.hasClass(child, className)) {
      result.push(child)
    }
  }
  return result
};
this.getElementByClass = function (node, className) {
  var args = cloneArray(arguments);
  args.splice(0, 1);
  for (var child = node.firstChild; child; child = child.nextSibling) {
    var args1 = cloneArray(args);
    args1.unshift(child);
    if (FBL.hasClass.apply(null, args1)) {
      return child
    } else {
      var found = FBL.getElementByClass.apply(null, args1);
      if (found) {
        return found
      }
    }
  }
  return null
};
this.isAncestor = function (node, potentialAncestor) {
  for (var parent = node; parent; parent = parent.parentNode) {
    if (parent == potentialAncestor) {
      return true
    }
  }
  return false
};
this.getNextElement = function (node) {
  while (node && node.nodeType != 1) {
    node = node.nextSibling
  }
  return node
};
this.getPreviousElement = function (node) {
  while (node && node.nodeType != 1) {
    node = node.previousSibling
  }
  return node
};
this.isElement = function (o) {
  try {
    return o && this.instanceOf(o, "Element")
  } catch (ex) {
    return false
  }
};
this.isLeftClick = function (event) {
  return (this.isIE && event.type != "click" && event.type != "dblclick" ? event.button == 1 : event.button == 0) && this.noKeyModifiers(event)
};
this.isMiddleClick = function (event) {
  return (this.isIE && event.type != "click" && event.type != "dblclick" ? event.button == 4 : event.button == 1) && this.noKeyModifiers(event)
};
this.isRightClick = function (event) {
  return (this.isIE && event.type != "click" && event.type != "dblclick" ? event.button == 2 : event.button == 2) && this.noKeyModifiers(event)
};
this.noKeyModifiers = function (event) {
  return !event.ctrlKey && !event.shiftKey && !event.altKey && !event.metaKey
};
this.isControlClick = function (event) {
  return (this.isIE && event.type != "click" && event.type != "dblclick" ? event.button == 1 : event.button == 0) && this.isControl(event)
};
this.isShiftClick = function (event) {
  return (this.isIE && event.type != "click" && event.type != "dblclick" ? event.button == 1 : event.button == 0) && this.isShift(event)
};
this.isControl = function (event) {
  return (event.metaKey || event.ctrlKey) && !event.shiftKey && !event.altKey
};
this.isAlt = function (event) {
  return event.altKey && !event.ctrlKey && !event.shiftKey && !event.metaKey
};
this.isAltClick = function (event) {
  return (this.isIE && event.type != "click" && event.type != "dblclick" ? event.button == 1 : event.button == 0) && this.isAlt(event)
};
this.isControlShift = function (event) {
  return (event.metaKey || event.ctrlKey) && event.shiftKey && !event.altKey
};
this.isShift = function (event) {
  return event.shiftKey && !event.metaKey && !event.ctrlKey && !event.altKey
};
this.addEvent = function (object, name, handler, useCapture) {
  if (object.addEventListener) {
    object.addEventListener(name, handler, useCapture)
  } else {
    object.attachEvent("on" + name, handler)
  }
};
this.removeEvent = function (object, name, handler, useCapture) {
  try {
    if (object.removeEventListener) {
      object.removeEventListener(name, handler, useCapture)
    } else {
      object.detachEvent("on" + name, handler)
    }
  } catch (e) {
  }
};
this.cancelEvent = function (e, preventDefault) {
  if (!e) {
    return
  }
  if (preventDefault) {
    if (e.preventDefault) {
      e.preventDefault()
    } else {
      e.returnValue = false
    }
  }
  if (e.stopPropagation) {
    e.stopPropagation()
  } else {
    e.cancelBubble = true
  }
};
this.getFileExtension = function (url) {
  if (!url) {
    return null
  }
  var queryString = url.indexOf("?");
  if (queryString != -1) {
    url = url.substr(0, queryString)
  }
  var lastDot = url.lastIndexOf(".");
  return url.substr(lastDot + 1)
};
this.isDataURL = function (url) {
  return (url && url.substr(0, 5) == "data:")
};