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diff --git a/tools/dochack/karax.nim b/tools/dochack/karax.nim
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--- a/tools/dochack/karax.nim
+++ /dev/null
@@ -1,344 +0,0 @@
-# Simple lib to write JS UIs
-
-import dom
-
-export dom.Element, dom.Event, dom.cloneNode, dom
-
-proc kout*[T](x: T) {.importc: "console.log", varargs.}
-  ## the preferred way of debugging karax applications.
-
-proc id*(e: Node): cstring {.importcpp: "#.id", nodecl.}
-proc `id=`*(e: Node; x: cstring) {.importcpp: "#.id = #", nodecl.}
-proc className*(e: Node): cstring {.importcpp: "#.className", nodecl.}
-proc `className=`*(e: Node; v: cstring) {.importcpp: "#.className = #", nodecl.}
-
-proc value*(e: Element): cstring {.importcpp: "#.value", nodecl.}
-proc `value=`*(e: Element; v: cstring) {.importcpp: "#.value = #", nodecl.}
-
-proc getElementsByClass*(e: Element; name: cstring): seq[Element] {.importcpp: "#.getElementsByClassName(#)", nodecl.}
-
-proc toLower*(x: cstring): cstring {.
-  importcpp: "#.toLowerCase()", nodecl.}
-proc replace*(x: cstring; search, by: cstring): cstring {.
-  importcpp: "#.replace(#, #)", nodecl.}
-
-type
-  EventHandler* = proc(ev: Event)
-  EventHandlerId* = proc(ev: Event; id: int)
-
-  Timeout* = ref object
-
-var document* {.importc.}: Document
-
-var
-  dorender: proc (): Element {.closure.}
-  drawTimeout: Timeout
-  currentTree: Element
-
-proc setRenderer*(renderer: proc (): Element) =
-  dorender = renderer
-
-proc setTimeout*(action: proc(); ms: int): Timeout {.importc, nodecl.}
-proc clearTimeout*(t: Timeout) {.importc, nodecl.}
-proc targetElem*(e: Event): Element = cast[Element](e.target)
-
-proc getElementById*(id: cstring): Element {.importc: "document.getElementById", nodecl.}
-
-proc getElementsByClassName*(cls: cstring): seq[Element] {.importc:
-  "document.getElementsByClassName", nodecl.}
-
-proc textContent*(e: Element): cstring {.
-  importcpp: "#.textContent", nodecl.}
-
-proc replaceById*(id: cstring; newTree: Node) =
-  let x = getElementById(id)
-  x.parentNode.replaceChild(newTree, x)
-  newTree.id = id
-
-proc equals(a, b: Node): bool =
-  if a.nodeType != b.nodeType: return false
-  if a.id != b.id: return false
-  if a.nodeName != b.nodeName: return false
-  if a.nodeType == TextNode:
-    if a.data != b.data: return false
-  elif a.childNodes.len != b.childNodes.len:
-    return false
-  if a.className != b.className:
-    # style differences are updated in place and we pretend
-    # it's still the same node
-    a.className = b.className
-    #return false
-  return true
-
-proc diffTree(parent, a, b: Node) =
-  if equals(a, b):
-    if a.nodeType != TextNode:
-      # we need to do this correctly in the presence of asyncronous
-      # DOM updates:
-      var i = 0
-      while i < a.childNodes.len and a.childNodes.len == b.childNodes.len:
-        diffTree(a, a.childNodes[i], b.childNodes[i])
-        inc i
-  elif parent == nil:
-    replaceById("ROOT", b)
-  else:
-    parent.replaceChild(b, a)
-
-proc dodraw() =
-  let newtree = dorender()
-  newtree.id = "ROOT"
-  if currentTree == nil:
-    currentTree = newtree
-    replaceById("ROOT", currentTree)
-  else:
-    diffTree(nil, currentTree, newtree)
-
-proc redraw*() =
-  # we buffer redraw requests:
-  if drawTimeout != nil:
-    clearTimeout(drawTimeout)
-  drawTimeout = setTimeout(dodraw, 30)
-
-proc tree*(tag: string; kids: varargs[Element]): Element =
-  result = document.createElement tag
-  for k in kids:
-    result.appendChild k
-
-proc tree*(tag: string; attrs: openarray[(string, string)];
-           kids: varargs[Element]): Element =
-  result = tree(tag, kids)
-  for a in attrs: result.setAttribute(a[0], a[1])
-
-proc text*(s: string): Element = cast[Element](document.createTextNode(s))
-proc text*(s: cstring): Element = cast[Element](document.createTextNode(s))
-proc add*(parent, kid: Element) =
-  if parent.nodeName == cstring"TR" and (
-      kid.nodeName == cstring"TD" or kid.nodeName == cstring"TH"):
-    let k = document.createElement("TD")
-    appendChild(k, kid)
-    appendChild(parent, k)
-  else:
-    appendChild(parent, kid)
-
-proc len*(x: Element): int {.importcpp: "#.childNodes.length".}
-proc `[]`*(x: Element; idx: int): Element {.importcpp: "#.childNodes[#]".}
-
-proc isInt*(s: cstring): bool {.asmNoStackFrame.} =
-  asm """
-    return s.match(/^[0-9]+$/);
-  """
-
-var
-  linkCounter: int
-
-proc link*(id: int): Element =
-  result = document.createElement("a")
-  result.setAttribute("href", "#")
-  inc linkCounter
-  result.setAttribute("id", $linkCounter & ":" & $id)
-
-proc link*(action: EventHandler): Element =
-  result = document.createElement("a")
-  result.setAttribute("href", "#")
-  addEventListener(result, "click", action)
-
-proc parseInt*(s: cstring): int {.importc, nodecl.}
-proc parseFloat*(s: cstring): float {.importc, nodecl.}
-proc split*(s, sep: cstring): seq[cstring] {.importcpp, nodecl.}
-
-proc startsWith*(a, b: cstring): bool {.importcpp: "startsWith", nodecl.}
-proc contains*(a, b: cstring): bool {.importcpp: "(#.indexOf(#)>=0)", nodecl.}
-proc substr*(s: cstring; start: int): cstring {.importcpp: "substr", nodecl.}
-proc substr*(s: cstring; start, length: int): cstring {.importcpp: "substr", nodecl.}
-
-#proc len*(s: cstring): int {.importcpp: "#.length", nodecl.}
-proc `&`*(a, b: cstring): cstring {.importcpp: "(# + #)", nodecl.}
-proc toCstr*(s: int): cstring {.importcpp: "((#)+'')", nodecl.}
-
-proc suffix*(s, prefix: cstring): cstring =
-  if s.startsWith(prefix):
-    result = s.substr(prefix.len)
-  else:
-    kout(cstring"bug! " & s & cstring" does not start with " & prefix)
-
-proc valueAsInt*(e: Element): int = parseInt(e.value)
-proc suffixAsInt*(s, prefix: cstring): int = parseInt(suffix(s, prefix))
-
-proc scrollTop*(e: Element): int {.importcpp: "#.scrollTop", nodecl.}
-proc offsetHeight*(e: Element): int {.importcpp: "#.offsetHeight", nodecl.}
-proc offsetTop*(e: Element): int {.importcpp: "#.offsetTop", nodecl.}
-
-template onImpl(s) {.dirty} =
-  proc wrapper(ev: Event) =
-    action(ev)
-    redraw()
-  addEventListener(e, s, wrapper)
-
-proc setOnclick*(e: Element; action: proc(ev: Event)) =
-  onImpl "click"
-
-proc setOnclick*(e: Element; action: proc(ev: Event; id: int)) =
-  proc wrapper(ev: Event) =
-    let id = ev.target.id
-    let a = id.split(":")
-    if a.len == 2:
-      action(ev, parseInt(a[1]))
-      redraw()
-    else:
-      kout(cstring("cannot deal with id "), id)
-  addEventListener(e, "click", wrapper)
-
-proc setOnfocuslost*(e: Element; action: EventHandler) =
-  onImpl "blur"
-
-proc setOnchanged*(e: Element; action: EventHandler) =
-  onImpl "change"
-
-proc setOnscroll*(e: Element; action: EventHandler) =
-  onImpl "scroll"
-
-proc select*(choices: openarray[string]): Element =
-  result = document.createElement("select")
-  var i = 0
-  for c in choices:
-    result.add tree("option", [("value", $i)], text(c))
-    inc i
-
-proc select*(choices: openarray[(int, string)]): Element =
-  result = document.createElement("select")
-  for c in choices:
-    result.add tree("option", [("value", $c[0])], text(c[1]))
-
-var radioCounter: int
-
-proc radio*(choices: openarray[(int, string)]): Element =
-  result = document.createElement("fieldset")
-  var i = 0
-  inc radioCounter
-  for c in choices:
-    let id = "radio_" & c[1] & $i
-    var kid = tree("input", [("type", "radio"),
-      ("id", id), ("name", "radio" & $radioCounter),
-      ("value", $c[0])])
-    if i == 0:
-      kid.setAttribute("checked", "checked")
-    var lab = tree("label", [("for", id)], text(c[1]))
-    kid.add lab
-    result.add kid
-    inc i
-
-proc tag*(name: string; id="", class=""): Element =
-  result = document.createElement(name)
-  if id.len > 0:
-    result.setAttribute("id", id)
-  if class.len > 0:
-    result.setAttribute("class", class)
-
-proc tdiv*(id="", class=""): Element = tag("div", id, class)
-proc span*(id="", class=""): Element = tag("span", id, class)
-
-proc th*(s: string): Element =
-  result = tag("th")
-  result.add text(s)
-
-proc td*(s: string): Element =
-  result = tag("td")
-  result.add text(s)
-
-proc td*(s: Element): Element =
-  result = tag("td")
-  result.add s
-
-proc td*(class: string; s: Element): Element =
-  result = tag("td")
-  result.add s
-  result.setAttribute("class", class)
-
-proc table*(class="", kids: varargs[Element]): Element =
-  result = tag("table", "", class)
-  for k in kids: result.add k
-
-proc tr*(kids: varargs[Element]): Element =
-  result = tag("tr")
-  for k in kids:
-    if k.nodeName == cstring"TD" or k.nodeName == cstring"TH":
-      result.add k
-    else:
-      result.add td(k)
-
-proc setClass*(e: Element; value: string) =
-  e.setAttribute("class", value)
-
-proc setAttr*(e: Element; key, value: cstring) =
-  e.setAttribute(key, value)
-
-proc getAttr*(e: Element; key: cstring): cstring {.
-  importcpp: "#.getAttribute(#)", nodecl.}
-
-proc realtimeInput*(id, val: string; changed: proc(value: cstring)): Element =
-  let oldElem = getElementById(id)
-  #if oldElem != nil: return oldElem
-  let newVal = if oldElem.isNil: val else: $oldElem.value
-  var timer: Timeout
-  proc wrapper() =
-    changed(getElementById(id).value)
-    redraw()
-  proc onkeyup(ev: Event) =
-    if timer != nil: clearTimeout(timer)
-    timer = setTimeout(wrapper, 400)
-  result = tree("input", [("type", "text"),
-    ("value", newVal),
-    ("id", id)])
-  result.addEventListener("keyup", onkeyup)
-
-proc ajax(meth, url: cstring; headers: openarray[(string, string)];
-          data: cstring;
-          cont: proc (httpStatus: int; response: cstring)) =
-  proc setRequestHeader(a, b: cstring) {.importc: "ajax.setRequestHeader".}
-  {.emit: """
-  var ajax = new XMLHttpRequest();
-  ajax.open(`meth`,`url`,true);""".}
-  for a, b in items(headers):
-    setRequestHeader(a, b)
-  {.emit: """
-  ajax.onreadystatechange = function(){
-    if(this.readyState == 4){
-      if(this.status == 200){
-        `cont`(this.status, this.responseText);
-      } else {
-        `cont`(this.status, this.statusText);
-      }
-    }
-  }
-  ajax.send(`data`);
-  """.}
-
-proc ajaxPut*(url: string; headers: openarray[(string, string)];
-          data: cstring;
-          cont: proc (httpStatus: int, response: cstring)) =
-  ajax("PUT", url, headers, data, cont)
-
-proc ajaxGet*(url: string; headers: openarray[(string, string)];
-          cont: proc (httpStatus: int, response: cstring)) =
-  ajax("GET", url, headers, nil, cont)
-
-{.push stackTrace:off.}
-
-proc setupErrorHandler*(useAlert=false) =
-  ## Installs an error handler that transforms native JS unhandled
-  ## exceptions into Nim based stack traces. If `useAlert` is false,
-  ## the error message it put into the console, otherwise `alert`
-  ## is called.
-  proc stackTraceAsCstring(): cstring = cstring(getStackTrace())
-  {.emit: """
-  window.onerror = function(msg, url, line, col, error) {
-    var x = "Error: " + msg + "\n" + `stackTraceAsCstring`()
-    if (`useAlert`)
-      alert(x);
-    else
-      console.log(x);
-    var suppressErrorAlert = true;
-    return suppressErrorAlert;
-  };""".}
-
-{.pop.}