/*
Last Modified: 

  AJS JavaScript library
    A very small library with a lot of functionality.
    For a much larger script look on http://www.mochikit.com/
  AUTHOR
    4mir Salihefendic (http://amix.dk) - amix@amix.dk
  LICENSE
    Copyright (c) 2006 Amir Salihefendic. All rights reserved.
    Copyright (c) 2005 Bob Ippolito. All rights reserved.
    http://www.opensource.org/licenses/mit-license.php
  VERSION
    3.3
  SITE
    http://orangoo.com/AmiNation/AJS
**/
if(!AJS) {
var AJS = {
  BASE_URL: "",

  drag_obj: null,
  drag_elm: null,
  _drop_zones: [],
  _cur_pos: null,


////
// General accessor functions
////
  getQueryArgument: function(var_name) {
    var query = window.location.search.substring(1);
    var vars = query.split("&");
    for (var i=0;i<vars.length;i++) {
      var pair = vars[i].split("=");
      if (pair[0] == var_name) {
        return pair[1];
      }
    }
    return null;
  },

  isIe: function() {
    return (navigator.userAgent.toLowerCase().indexOf("msie") != -1 && navigator.userAgent.toLowerCase().indexOf("opera") == -1);
  },
  isNetscape7: function() {
    return (navigator.userAgent.toLowerCase().indexOf("netscape") != -1 && navigator.userAgent.toLowerCase().indexOf("7.") != -1);
  },
  isSafari: function() {
    return (navigator.userAgent.toLowerCase().indexOf("khtml") != -1);
  },
  isOpera: function() {
    return (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
  },
  isMozilla: function() {
    return (navigator.userAgent.toLowerCase().indexOf("gecko") != -1 && navigator.productSub >= 20030210);
  },


////
// Array functions
////
  //Shortcut: AJS.$A
  createArray: function(v) {
    if(AJS.isArray(v) && !AJS.isString(v))
      return v;
    else if(!v)
      return [];
    else
      return [v];
  },

  forceArray: function(args) {
    var r = [];
    AJS.map(args, function(elm) {
      r.push(elm);
    });
    return r;
  },

  join: function(delim, list) {
    try {
      return list.join(delim);
    }
    catch(e) {
      var r = list[0] || '';
      AJS.map(list, function(elm) {
        r += delim + elm;
      }, 1);
      return r + '';
    }
  },

  isIn: function(elm, list) {
    var i = AJS.getIndex(elm, list);
    if(i != -1)
      return true;
    else
      return false;
  },

  getIndex: function(elm, list/*optional*/, eval_fn) {
    for(var i=0; i < list.length; i++)
      if(eval_fn && eval_fn(list[i]) || elm == list[i])
        return i;
    return -1;
  },

  getFirst: function(list) {
    if(list.length > 0)
      return list[0];
    else
      return null;
  },

  getLast: function(list) {
    if(list.length > 0)
      return list[list.length-1];
    else
      return null;
  },

  update: function(l1, l2) {
    for(var i in l2)
      l1[i] = l2[i];
    return l1;
  },

  flattenList: function(list) {
    var r = [];
    var _flatten = function(r, l) {
      AJS.map(l, function(o) {
        if (AJS.isArray(o))
          _flatten(r, o);
        else
          r.push(o);
      });
    }
    _flatten(r, list);
    return r;
  },


////
// Functional programming
////
  map: function(list, fn,/*optional*/ start_index, end_index) {
    var i = 0, l = list.length;
    if(start_index)
       i = start_index;
    if(end_index)
       l = end_index;
    for(i; i < l; i++)
      fn.apply(null, [list[i], i]);
  },

  filter: function(list, fn, /*optional*/ start_index, end_index) {
    var r = [];
    AJS.map(list, function(elm) {
      if(fn(elm))
        r.push(elm);
    }, start_index, end_index);
    return r;
  },

  partial: function(fn) {
    var args = AJS.forceArray(arguments);
    return AJS.$b(fn, null, args.slice(1, args.length).reverse(), false, true);
  },


////
// DOM functions
////
  //Shortcut: AJS.$
  getElement: function(id) {
    if(AJS.isString(id) || AJS.isNumber(id))
      return document.getElementById(id);
    else
      return id;
  },

  //Shortcut: AJS.$$
  getElements: function(/*id1, id2, id3*/) {
    var args = AJS.flattenList(arguments);
    var elements = new Array();
      for (var i = 0; i < args.length; i++) {
        var element = AJS.getElement(args[i]);
        elements.push(element);
      }
      return elements;
  },

  //Shortcut: AJS.$bytc
  getElementsByTagAndClassName: function(tag_name, class_name, /*optional*/ parent) {
    var class_elements = [];
    if(!AJS.isDefined(parent))
      parent = document;
    if(!AJS.isDefined(tag_name))
      tag_name = '*';

    var els = parent.getElementsByTagName(tag_name);
    var els_len = els.length;
    var pattern = new RegExp("(^|\\s)" + class_name + "(\\s|$)");

    for (i = 0, j = 0; i < els_len; i++) {
      if ( pattern.test(els[i].className) || class_name == null ) {
        class_elements[j] = els[i];
        j++;
      }
    }
    return class_elements;
  },

  _nodeWalk: function(elm, tag_name, class_name, fn_next_elm) {
    var p = fn_next_elm(elm);
    while(p) {
      if((AJS.nodeName(p) == tag_name || !tag_name) && (p.className == class_name || !class_name))
        return p;
      else
        p = fn_next_elm(p);
    }
    return null;
  },

  getParentBytc: function(elm, tag_name, class_name) {
    return AJS._nodeWalk(elm, tag_name, class_name, function(m) { return m.parentNode; });
  },

  getPreviousSiblingBytc: function(elm, tag_name, class_name) {
    return AJS._nodeWalk(elm, tag_name, class_name, function(m) { return m.previousSibling; });
  },

  getNextSiblingBytc: function(elm, tag_name, class_name) {
    return AJS._nodeWalk(elm, tag_name, class_name, function(m) { return m.nextSibling; });
  },

  //Shortcut: AJS.$f
  getFormElement: function(form, name) {
    form = AJS.$(form);
    var r = null;
    AJS.map(form.elements, function(elm) {
      if(elm.name && elm.name == name)
        r = elm;
    });
    return r;
  },

  formContents: function(form) {
    var form = AJS.$(form);
    var r = {};
    var fn = function(elms) {
      AJS.map(elms, function(e) {
        if(e.name)
          r[e.name] = e.value || '';
      });
    }
    fn(AJS.$bytc('input', null, form));
    fn(AJS.$bytc('textarea', null, form));
    return r;
  },

  getBody: function() {
    return AJS.$bytc('body')[0]
  },

  nodeName: function(elm) {
    return elm.nodeName.toLowerCase();
  },

  hasParent: function(elm, parent_to_consider, max_look_up) {
    if(elm == parent_to_consider)
      return true;
    if(max_look_up == 0)
      return false;
    return AJS.hasParent(elm.parentNode, parent_to_consider, max_look_up-1);
  },

  isElementHidden: function(elm) {
    return elm.style.visibility == "hidden";
  },

  //Shortcut: AJS.DI
  documentInsert: function(element) {
    document.writeln('<span id="dummy_holder"></span>');
    AJS.swapDOM(AJS.$('dummy_holder'), element);
  },

  cloner: function(element) {
    return function() {
      return element.cloneNode(true);
    }
  },

  //Shortcut: AJS.ACN
  appendChildNodes: function(elm/*, elms...*/) {
    if(arguments.length >= 2) {
      AJS.map(arguments, function(n) {
        if(AJS.isString(n))
          n = AJS.TN(n);
        if(AJS.isDefined(n))
          elm.appendChild(n);
      }, 1);
    }
    return elm;
  },

  //Shortcut: AJS.RCN
  replaceChildNodes: function(elm/*, elms...*/) {
    var child;
    while ((child = elm.firstChild))
      elm.removeChild(child);
    if (arguments.length < 2)
      return elm;
    else
      return AJS.appendChildNodes.apply(null, arguments);
    return elm;
  },

  insertAfter: function(elm, reference_elm) {
    reference_elm.parentNode.insertBefore(elm, reference_elm.nextSibling);
    return elm;
  },

  insertBefore: function(elm, reference_elm) {
    reference_elm.parentNode.insertBefore(elm, reference_elm);
    return elm;
  },

  showElement: function(/*elms...*/) {
    var args = AJS.flattenList(arguments);
    AJS.map(args, function(elm) { elm.style.display = ''});
  },

  hideElement: function(elm) {
    var args = AJS.flattenList(arguments);
    AJS.map(args, function(elm) { elm.style.display = 'none'});
  },

  swapDOM: function(dest, src) {
    dest = AJS.getElement(dest);
    var parent = dest.parentNode;
    if (src) {
      src = AJS.getElement(src);
      parent.replaceChild(src, dest);
    } else {
      parent.removeChild(dest);
    }
    return src;
  },

  removeElement: function(/*elm1, elm2...*/) {
    var args = AJS.flattenList(arguments);
    AJS.map(args, function(elm) { AJS.swapDOM(elm, null); });
  },

  createDOM: function(name, attrs) {
    var i=0, attr;
    elm = document.createElement(name);

    if(AJS.isDict(attrs[i])) {
      for(k in attrs[0]) {
        attr = attrs[0][k];
        if(k == "style")
          elm.style.cssText = attr;
        else if(k == "class" || k == 'className')
          elm.className = attr;
        else {
          elm.setAttribute(k, attr);
        }
      }
      i++;
    }

    if(attrs[0] == null)
      i = 1;

    AJS.map(attrs, function(n) {
      if(n) {
        if(AJS.isString(n) || AJS.isNumber(n))
          n = AJS.TN(n);
        elm.appendChild(n);
      }
    }, i);
    return elm;
  },

  _createDomShortcuts: function() {
    var elms = [
        "ul", "li", "td", "tr", "th",
        "tbody", "table", "input", "span", "b",
        "a", "div", "img", "button", "h1",
        "h2", "h3", "br", "textarea", "form",
        "p", "select", "option", "iframe", "script",
        "center", "dl", "dt", "dd", "small",
        "pre"
    ];
    var createDOM = AJS.createDOM;
    var extends_ajs = function(elm) {
      var c_dom = "return createDOM.apply(null, ['" + elm + "', arguments]);";
      var c_fun_dom = 'function() { ' + c_dom + '  }';
      eval("AJS." + elm.toUpperCase() + "=" + c_fun_dom);
    }
    AJS.map(elms, extends_ajs);
    AJS.TN = function(text) { return document.createTextNode(text) };
  },

  getCssDim: function(dim) {
    if(AJS.isString(dim))
      return dim;
    else
      return dim + "px";
  },

  setWidth: function(/*elm1, elm2..., width*/) {
    var args = AJS.flattenList(arguments);
    var w = args.pop();
    AJS.map(args, function(elm) { elm.style.width = AJS.getCssDim(w)});
  },
  setHeight: function(/*elm1, elm2..., height*/) {
    var args = AJS.flattenList(arguments);
    var h = args.pop();
    AJS.map(args, function(elm) { elm.style.height = AJS.getCssDim(h)});
  },
  setLeft: function(/*elm1, elm2..., left*/) {
    var args = AJS.flattenList(arguments);
    var l = args.pop();
    AJS.map(args, function(elm) { elm.style.left = AJS.getCssDim(l)});
  },
  setTop: function(/*elm1, elm2..., top*/) {
    var args = AJS.flattenList(arguments);
    var t = args.pop();
    AJS.map(args, function(elm) { elm.style.top = AJS.getCssDim(t)});
  },
  setClass: function(/*elm1, elm2..., className*/) {
    var args = AJS.flattenList(arguments);
    var c = args.pop();
    AJS.map(args, function(elm) { elm.className = c});
  },
  addClass: function(/*elm1, elm2..., className*/) {
    var args = AJS.flattenList(arguments);
    var cls = args.pop();
    var add_class = function(o) {
      if(!new RegExp("(^|\\s)" + cls + "(\\s|$)").test(o.className))
        o.className += (o.className ? " " : "") + cls;
    };
    AJS.map(args, function(elm) { add_class(elm); });
  },
  removeClass: function(/*elm1, elm2..., className*/) {
    var args = AJS.flattenList(arguments);
    var cls = args.pop();
    var rm_class = function(o) {
      o.className = o.className.replace(new RegExp("\\s?" + cls), "");
    };
    AJS.map(args, function(elm) { rm_class(elm); });
  },

  setHTML: function(elm, html) {
    elm.innerHTML = html;
    return elm;
  },

  RND: function(tmpl, ns, scope) {
    scope = scope || window;
    var fn = function(w, g) {
      g = g.split("|");
      var cnt = ns[g[0]];
      for(var i=1; i < g.length; i++)
        cnt = scope[g[i]](cnt);
      if(cnt == 0 || cnt == -1)
        cnt += '';
      return cnt || w;
    };
    return tmpl.replace(/%\(([A-Za-z0-9_|.]*)\)/g, fn);
  },

  HTML2DOM: function(html,/*optional*/ first_child) {
    var d = AJS.DIV();
    d.innerHTML = html;
    if(first_child)
      return d.childNodes[0];
    else
      return d;
  },


////
// Effects
////
  setOpacity: function(elm, p) {
    elm.style.opacity = p;
    elm.style.filter = "alpha(opacity="+ p*100 +")";
  },


////
// Ajax functions
////
  getXMLHttpRequest: function() {
    var try_these = [
      function () { return new XMLHttpRequest(); },
      function () { return new ActiveXObject('Msxml2.XMLHTTP'); },
      function () { return new ActiveXObject('Microsoft.XMLHTTP'); },
      function () { return new ActiveXObject('Msxml2.XMLHTTP.4.0'); },
      function () { throw "Browser does not support XMLHttpRequest"; }
    ];
    for (var i = 0; i < try_these.length; i++) {
      var func = try_these[i];
      try {
        return func();
      } catch (e) {
      }
    }
  },

  getRequest: function(url, data, type) {
    //Extend the privlege so we can make cross host reqs
    try {
      netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
    } catch (e) { }

    if(!type)
      type = "POST";
    var req = AJS.getXMLHttpRequest();

    if(url.indexOf("http://") == -1) {
      if(AJS.BASE_URL != '') {
        if(AJS.BASE_URL.lastIndexOf('/') != AJS.BASE_URL.length-1)
          AJS.BASE_URL += '/';
        url = AJS.BASE_URL + url;
      }
      else
        url = window.location + url;
    }

    req.open(type, url, true);
    if(type == "POST")
      req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    return AJS._sendXMLHttpRequest(req);
  },

  _sendXMLHttpRequest: function(req, data) {
    var d = new AJSDeferred(req);

    var onreadystatechange = function () {
      if (req.readyState == 4) {
        var status = '';
        try {
          status = req.status;
        }
        catch(e) {};
        if(status == 200 || status == 304 || req.responseText == null) {
          d.callback();
        }
        else if(status == 500) {
          alert(req.responseText);
          d.errback();
        }
        else {
          d.errback();
        }
      }
    }
    req.onreadystatechange = onreadystatechange;
    return d;
  },

  _reprString: function(o) {
    return ('"' + o.replace(/(["\\])/g, '\\$1') + '"'
    ).replace(/[\f]/g, "\\f"
    ).replace(/[\b]/g, "\\b"
    ).replace(/[\n]/g, "\\n"
    ).replace(/[\t]/g, "\\t"
    ).replace(/[\r]/g, "\\r");
  },

  serializeJSON: function(o) {
    var objtype = typeof(o);
    if (objtype == "undefined") {
      return "undefined";
    } else if (objtype == "number" || objtype == "boolean") {
      return o + "";
    } else if (o === null) {
      return "null";
    }
    if (objtype == "string") {
      return AJS._reprString(o);
    }
    var me = arguments.callee;
    if (objtype != "function" && typeof(o.length) == "number") {
      var res = [];
      for (var i = 0; i < o.length; i++) {
        var val = me(o[i]);
        if (typeof(val) != "string") {
          val = "undefined";
        }
        res.push(val);
      }
      return "[" + res.join(",") + "]";
    }
    // it's a function with no adapter, bad
    if (objtype == "function")
      return null;
    res = [];
    for (var k in o) {
      var useKey;
      if (typeof(k) == "number") {
        useKey = '"' + k + '"';
      } else if (typeof(k) == "string") {
        useKey = AJS._reprString(k);
      } else {
        // skip non-string or number keys
        continue;
      }
      val = me(o[k]);
      if (typeof(val) != "string") {
        // skip non-serializable values
        continue;
      }
      res.push(useKey + ":" + val);
    }
    return "{" + res.join(",") + "}";
  },

  loadJSONDoc: function(url) {
    var d = AJS.getRequest(url);
    var eval_req = function(data, req) {
      var text = req.responseText;
      if(text == "Error")
        d.errback(req);
      else
        return AJS.evalTxt(text);
    };
    d.addCallback(eval_req);
    return d;
  },

  evalTxt: function(txt) {
    try {
      return eval('('+ txt + ')');
    }
    catch(e) {
      return eval(txt);
    }
  },

  evalScriptTags: function(html) {
    var script_data = html.match(/<script.*?>((\n|\r|.)*?)<\/script>/g);
    if(script_data != null) {
      for(var i=0; i < script_data.length; i++) {
        var script_only = script_data[i].replace(/<script.*?>/g, "");
        script_only = script_only.replace(/<\/script>/g, "");
        eval(script_only);
      }
    }
  },

  queryArguments: function(data) {
    var post_data = [];
    for(k in data)
      post_data.push(k + "=" + AJS.urlencode(data[k]));
    return post_data.join("&");
  },


////
// Position and size
////
  getMousePos: function(e) {
    var posx = 0;
    var posy = 0;
    if (!e) var e = window.event;
    if (e.pageX || e.pageY)
    {
      posx = e.pageX;
      posy = e.pageY;
    }
    else if (e.clientX || e.clientY)
    {
      posx = e.clientX + document.body.scrollLeft;
      posy = e.clientY + document.body.scrollTop;
    }
    return {x: posx, y: posy};
  },

  getScrollTop: function() {
    //From: http://www.quirksmode.org/js/doctypes.html
    var t;
    if (document.documentElement && document.documentElement.scrollTop)
        t = document.documentElement.scrollTop;
    else if (document.body)
        t = document.body.scrollTop;
    return t;
  },

  absolutePosition: function(elm) {
    var posObj = {'x': elm.offsetLeft, 'y': elm.offsetTop};
    if(elm.offsetParent) {
      var temp_pos =	AJS.absolutePosition(elm.offsetParent);
      posObj.x += temp_pos.x;
      posObj.y += temp_pos.y;
    }
    // safari bug
    if (AJS.isSafari() && elm.style.position == 'absolute' ) {
      posObj.x -= document.body.offsetLeft;
      posObj.y -= document.body.offsetTop;
    }
    return posObj;
  },

  getWindowSize: function() {
    var win_w, win_h;
    if (self.innerHeight) {
      win_w = self.innerWidth;
      win_h = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) {
      win_w = document.documentElement.clientWidth;
      win_h = document.documentElement.clientHeight;
    } else if (document.body) {
      win_w = document.body.clientWidth;
      win_h = document.body.clientHeight;
    }
    return {'w': win_w, 'h': win_h};
  },

  isOverlapping: function(elm1, elm2) {
    var pos_elm1 = AJS.absolutePosition(elm1);
    var pos_elm2 = AJS.absolutePosition(elm2);

    var top1 = pos_elm1.y;
    var left1 = pos_elm1.x;
    var right1 = left1 + elm1.offsetWidth;
    var bottom1 = top1 + elm1.offsetHeight;
    var top2 = pos_elm2.y;
    var left2 = pos_elm2.x;
    var right2 = left2 + elm2.offsetWidth;
    var bottom2 = top2 + elm2.offsetHeight;
    var getSign = function(v) {
      if(v > 0) return "+";
      else if(v < 0) return "-";
      else return 0;
    }

    if ((getSign(top1 - bottom2) != getSign(bottom1 - top2)) &&
        (getSign(left1 - right2) != getSign(right1 - left2)))
      return true;
    return false;
  },


////
// Events
////
  getEventElm: function(e) {
    if(e && !e.type && !e.keyCode)
      return e
    var targ;
    if (!e) var e = window.event;
    if (e.target) targ = e.target;
    else if (e.srcElement) targ = e.srcElement;
    if (targ.nodeType == 3) // defeat Safari bug
      targ = targ.parentNode;
    return targ;
  },

  _getRealScope: function(fn, /*optional*/ extra_args, dont_send_event, rev_extra_args) {
    var scope = window;
    extra_args = AJS.$A(extra_args);
    if(fn._cscope)
      scope = fn._cscope;

    return function() {
      //Append all the orginal arguments + extra_args
      var args = [];
      var i = 0;
      if(dont_send_event)
        i = 1;

      AJS.map(arguments, function(arg) { args.push(arg) }, i);
      args = args.concat(extra_args);
      if(rev_extra_args)
        args = args.reverse();
      return fn.apply(scope, args);
    };
  },

  _unloadListeners: function() {
    if(AJS.listeners)
      AJS.map(AJS.listeners, function(elm, type, fn) {AJS.removeEventListener(elm, type, fn)});
    AJS.listeners = [];
  },

  //Shortcut: AJS.AEV
  addEventListener: function(elm, type, fn, /*optional*/listen_once, cancle_bubble) {
    if(!cancle_bubble)
      cancle_bubble = false;

    var elms = AJS.$A(elm);
    AJS.map(elms, function(elmz) {
      if(listen_once)
        fn = AJS._listenOnce(elmz, type, fn);
      
      //Hack since it does not work in all browsers
      if(AJS.isIn(type, ['submit', 'load', 'scroll', 'resize'])) {
        var old = elm['on' + type];
        elm['on' + type] = function() {
          if(old) {
            fn(arguments);
            return old(arguments);
          }
          else
            return fn(arguments);
        };
        return;
      }

      //Fix keyCode
      if(AJS.isIn(type, ['keypress', 'keydown', 'keyup'])) {
        var old_fn = fn;
        fn = function(e) {
          e.key = e.keyCode ? e.keyCode : e.charCode;
          switch(e.key) {
            case 63232:
              e.key = 38;
              break;
            case 63233:
              e.key = 40;
              break;
            case 63235:
              e.key = 39;
              break;
            case 63234:
              e.key = 37;
              break;
          }
          return old_fn.apply(null, arguments);
        }
      }

      if (elmz.attachEvent) {
        //FIXME: We ignore cancle_bubble for IE... could be a problem?
        elmz.attachEvent("on" + type, fn);
      }
      else if(elmz.addEventListener)
        elmz.addEventListener(type, fn, cancle_bubble);

      AJS.listeners = AJS.$A(AJS.listeners);
      AJS.listeners.push([elmz, type, fn]);
    });
  },

  //Shortcut: AJS.REV
  removeEventListener: function(elm, type, fn, /*optional*/cancle_bubble) {
    if(!cancle_bubble)
      cancle_bubble = false;
    if(elm.removeEventListener) {
      elm.removeEventListener(type, fn, cancle_bubble);
      if(AJS.isOpera())
        elm.removeEventListener(type, fn, !cancle_bubble);
    }
    else if(elm.detachEvent)
      elm.detachEvent("on" + type, fn);
  },

  //Shortcut: AJS.$b
  bind: function(fn, scope, /*optional*/ extra_args, dont_send_event, rev_extra_args) {
    fn._cscope = scope;
    return AJS._getRealScope(fn, extra_args, dont_send_event, rev_extra_args);
  },

  _listenOnce: function(elm, type, fn) {
    var r_fn = function() {
      AJS.removeEventListener(elm, type, r_fn);
      fn(arguments);
    }
    return r_fn;
  },

  callLater: function(fn, interval) {
    var fn_no_send = function() {
      fn();
    };
    window.setTimeout(fn_no_send, interval);
  },

  preventDefault: function(e) {
    if(AJS.isIe()) 
      window.event.returnValue = false;
    else 
      e.preventDefault();
  },


////
// Drag and drop
////
  dragAble: function(elm, /*optional*/ handler, args) {
    if(!args)
      args = {};
    if(!AJS.isDefined(args['move_x']))
      args['move_x'] = true;
    if(!AJS.isDefined(args['move_y']))
      args['move_y'] = true;
    if(!AJS.isDefined(args['moveable']))
      args['moveable'] = false;
    if(!AJS.isDefined(args['hide_on_move']))
      args['hide_on_move'] = true;
    if(!AJS.isDefined(args['on_mouse_up']))
      args['on_mouse_up'] = null;
    if(!AJS.isDefined(args['cursor']))
      args['cursor'] = 'move';
    if(!AJS.isDefined(args['max_move']))
      args['max_move'] = {'top': null, 'left': null};

    elm = AJS.$(elm);

    if(!handler)
      handler = elm;

    handler = AJS.$(handler);
    handler.style.cursor = args['cursor'];
    elm.style.position = 'relative';

    AJS.AEV(handler, 'mousedown', function(e) {
      AJS._dragInit(e, elm, args);
    });
  },

  dropZone: function(elm, args) {
    elm = AJS.$(elm);
    var item = {elm: elm};
    AJS.update(item, args);
    AJS._drop_zones.push(item);
  },

  _dragInit: function(e, click_elm, args) {
    AJS.drag_obj = new Object();
    AJS.drag_obj.args = args;

    AJS.drag_obj.click_elm = click_elm;
    AJS.drag_obj.mouse_pos = AJS.getMousePos(e);
    AJS.drag_obj.click_elm_pos = AJS.absolutePosition(click_elm);

    AJS.AEV(document, 'mousemove', AJS._dragMove, false, true);
    AJS.AEV(document, 'mouseup', AJS._dragStop, false, true);

    if (AJS.isIe())
      window.event.cancelBubble = true;
    AJS.preventDefault(e);
  },

  _initDragElm: function(elm) {
    if(AJS.drag_elm && AJS.drag_elm.style.display == 'none')
      AJS.removeElement(AJS.drag_elm);

    if(!AJS.drag_elm) {
      AJS.drag_elm = AJS.DIV();
      var d = AJS.drag_elm;
      AJS.insertBefore(d, AJS.getBody().firstChild);
      AJS.setHTML(d, elm.innerHTML);

      d.className = elm.className;
      d.style.cssText = elm.style.cssText;

      d.style.position = 'absolute';
      d.style.zIndex = 10000;

      var t = AJS.absolutePosition(elm);
      AJS.setTop(d, t.y);
      AJS.setLeft(d, t.x);
    }
  },

  _dragMove: function(e) {
    var drag_obj = AJS.drag_obj;
    var click_elm = drag_obj.click_elm;

    AJS._initDragElm(click_elm);
    var drag_elm = AJS.drag_elm;

    if(drag_obj.args['hide_on_move'])
      click_elm.style.visibility = 'hidden';

    var cur_pos = AJS.getMousePos(e);

    var mouse_pos = drag_obj.mouse_pos;

    var click_elm_pos = drag_obj.click_elm_pos;

    AJS.map(AJS._drop_zones, function(d_z) {
      if(AJS.isOverlapping(d_z['elm'], drag_elm)) {
        if(d_z['elm'] != drag_elm) {
          var on_hover = d_z['on_hover'];
          if(on_hover)
            on_hover(d_z['elm'], click_elm, drag_elm);
        }
      }
    });

    if(drag_obj.args['on_drag'])
      drag_obj.args['on_drag'](click_elm, drag_elm, e);

    var max_move_top = drag_obj.args['max_move']['top'];
    var max_move_left = drag_obj.args['max_move']['left'];
    var p;
    if(drag_obj.args['move_x']) {
      p = cur_pos.x - (mouse_pos.x - click_elm_pos.x);
      if(max_move_left == null || max_move_left <= p)
        AJS.setLeft(elm, p);
    }

    if(drag_obj.args['move_y']) {
      p = cur_pos.y - (mouse_pos.y - click_elm_pos.y);
      if(max_move_top == null || max_move_top <= p)
        AJS.setTop(elm, p);
    }
    if(AJS.isIe()) {
      window.event.cancelBubble = true;
      window.event.returnValue = false;
    }
    else
      e.preventDefault();
  },

  _dragStop: function(e) {
    var drag_obj = AJS.drag_obj;
    var click_elm = drag_obj.click_elm;
    var drag_elm = AJS.drag_elm;

    AJS.REV(document, "mousemove", AJS._dragMove, true);
    AJS.REV(document, "mouseup", AJS._dragStop, true);

    var dropped = false;
    AJS.map(AJS._drop_zones, function(d_z) {
      if(AJS.isOverlapping(d_z['elm'], click_elm)) {
        if(d_z['elm'] != click_elm) {
          var on_drop = d_z['on_drop'];
          if(on_drop) {
            dropped = true;
            on_drop(d_z['elm'], click_elm, drag_elm);
          }
        }
      }
    });

    if(drag_obj.args['moveable']) {
      var t = parseInt(click_elm.style.top) || 0;
      var l = parseInt(click_elm.style.left) || 0;
      var drag_elm_xy = AJS.absolutePosition(drag_elm);
      var click_elm_xy = AJS.absolutePosition(click_elm);
      AJS.setTop(click_elm, t + drag_elm_xy.y - click_elm_xy.y);
      AJS.setLeft(click_elm, l + drag_elm_xy.x - click_elm_xy.x);
    }

    if(!dropped && drag_obj.args['on_mouse_up'])
      drag_obj.args['on_mouse_up'](click_elm, drag_obj, e);

    if(drag_obj.args['hide_on_move'])
      drag_obj.click_elm.style.visibility = 'visible';

    AJS._dragObj = null;
    AJS.hideElement(AJS.drag_elm);
    AJS.drag_elm = null;
  },


////
// Misc.
////
  keys: function(obj) {
    var rval = [];
    for (var prop in obj) {
      rval.push(prop);
    }
    return rval;
  },

  urlencode: function(str) {
    return encodeURIComponent(str.toString());
  },

  isDefined: function(o) {
    return (o != "undefined" && o != null)
  },

  isArray: function(obj) {
    return obj instanceof Array;
  },

  isString: function(obj) {
    return (typeof obj == 'string');
  },

  isNumber: function(obj) {
    return (typeof obj == 'number');
  },

  isObject: function(obj) {
    return (typeof obj == 'object');
  },

  isDict: function(o) {
    var str_repr = String(o);
    return str_repr.indexOf(" Object") != -1;
  },

  exportToGlobalScope: function() {
    for(e in AJS)
      eval(e + " = AJS." + e);
  },

  log: function(o) {
    if(AJS.isMozilla())
      console.log(o);
    else {
      var div = AJS.DIV({'style': 'color: green'});
      AJS.ACN(AJS.getBody(), AJS.setHTML(div, ''+o));
    }
  }
}

//Shortcuts
AJS.$ = AJS.getElement;
AJS.$$ = AJS.getElements;
AJS.$f = AJS.getFormElement;
AJS.$b = AJS.bind;
AJS.$A = AJS.createArray;
AJS.DI = AJS.documentInsert;
AJS.ACN = AJS.appendChildNodes;
AJS.RCN = AJS.replaceChildNodes;
AJS.AEV = AJS.addEventListener;
AJS.REV = AJS.removeEventListener;
AJS.$bytc = AJS.getElementsByTagAndClassName;

AJSDeferred = function(req) {
  this.callbacks = [];
  this.errbacks = [];
  this.req = req;
}
AJSDeferred.prototype = {
  excCallbackSeq: function(req, list) {
    var data = req.responseText;
    while (list.length > 0) {
      var fn = list.pop();
      var new_data = fn(data, req);
      if(new_data)
        data = new_data;
    }
  },

  callback: function () {
    this.excCallbackSeq(this.req, this.callbacks);
  },

  errback: function() {
    if(this.errbacks.length == 0)
      alert("Error encountered:\n" + this.req.responseText);

    this.excCallbackSeq(this.req, this.errbacks);
  },

  addErrback: function(fn) {
    this.errbacks.unshift(fn);
  },

  addCallback: function(fn) {
    this.callbacks.unshift(fn);
  },

  addCallbacks: function(fn1, fn2) {
    this.addCallback(fn1);
    this.addErrback(fn2);
  },

  sendReq: function(data) {
    if(AJS.isObject(data)) {
      this.req.send(AJS.queryArguments(data));
    }
    else if(AJS.isDefined(data))
      this.req.send(data);
    else {
      this.req.send("");
    }
  }
};

//Prevent memory-leaks
AJS.addEventListener(window, 'unload', AJS._unloadListeners);
AJS._createDomShortcuts()
}

script_loaded = true;