/*
Behaviour v1.1 by Ben Nolan, June 2005. Based largely on the work of Simon Willison (see comments by Simon below).
License: This file is entirely BSD licensed.
More information: http://ripcord.co.nz/behaviour/
*/   

var Behaviour = {
  list : new Array,
  register : function(sheet){Behaviour.list.push(sheet);},
  start : function(){Behaviour.addLoadEvent(function(){Behaviour.apply();});},
  apply : function(){
    for (h=0;sheet=Behaviour.list[h];h++){
      for (selector in sheet){
        list = document.getElementsBySelector(selector);
        if (!list){continue;}
        for (i=0;element=list[i];i++){sheet[selector](element);}
      }
    }
  },
  addLoadEvent : function(func){
    var oldonload = window.onload;
    if (typeof window.onload != 'function'){window.onload = func;}
    else { window.onload = function() { oldonload(); func(); } }
  }
}

Behaviour.start();

/*
The following code is Copyright (C) Simon Willison 2004.
New in version 0.4: Support for CSS2 and CSS3 attribute selectors:
See http://www.w3.org/TR/css3-selectors/#attribute-selectors
Version 0.4 - Simon Willison, March 25th 2003
-- Works in Phoenix 0.5, Mozilla 1.3, Opera 7, Internet Explorer 6, Internet Explorer 5 on Windows
-- Opera 7 fails 
*/

function getAllChildren(e) { return e.all ? e.all : e.getElementsByTagName('*'); }

document.getElementsBySelector = function(selector) {
  if (!document.getElementsByTagName) { return new Array(); }
  var tokens = selector.split(' ');
  var currentContext = new Array(document);
  for (var i = 0; i < tokens.length; i++) {
    token = tokens[i].replace(/^\s+/,'').replace(/\s+$/,'');;
    if (token.indexOf('#') > -1) {
      var bits = token.split('#');
      var tagName = bits[0];
      var id = bits[1];
      var element = document.getElementById(id);
      if (tagName && element.nodeName.toLowerCase() != tagName) { return new Array(); }
      currentContext = new Array(element);
      continue;
    }
    if (token.indexOf('.') > -1) {
      var bits = token.split('.');
      var tagName = bits[0];
      var className = bits[1];
      if (!tagName) { tagName = '*'; }
      var found = new Array;
      var foundCount = 0;
      for (var h = 0; h < currentContext.length; h++) {
        var elements;
        if (tagName == '*') {elements = getAllChildren(currentContext[h]);}
        else {elements = currentContext[h].getElementsByTagName(tagName);}
        for (var j = 0; j < elements.length; j++) {found[foundCount++] = elements[j];}
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      for (var k = 0; k < found.length; k++) {if (found[k].className && found[k].className.match(new RegExp('\\b'+className+'\\b'))) {currentContext[currentContextIndex++] = found[k];}}
      continue;
    }
    if (token.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/)) {
      var tagName = RegExp.$1;
      var attrName = RegExp.$2;
      var attrOperator = RegExp.$3;
      var attrValue = RegExp.$4;
      if (!tagName) {tagName = '*';}
      var found = new Array;
      var foundCount = 0;
      for (var h = 0; h < currentContext.length; h++) {
        var elements;
        if (tagName == '*') {elements = getAllChildren(currentContext[h]);}
        else {elements = currentContext[h].getElementsByTagName(tagName);}
        for (var j = 0; j < elements.length; j++) {found[foundCount++] = elements[j];}
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      var checkFunction;
      switch (attrOperator) {
        case '=': // Equality
          checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
          break;
        case '~': // Match one of space seperated words 
          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
          break;
        case '|': // Match start with value followed by optional hyphen
          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
          break;
        case '^': // Match starts with value
          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
          break;
        case '$': // Match ends with value - fails with "Warning" in Opera 7
          checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };
          break;
        case '*': // Match ends with value
          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };
          break;
        default :
          // Just test for existence of attribute
          checkFunction = function(e) { return e.getAttribute(attrName); };
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      for (var k = 0; k < found.length; k++) {
        if (checkFunction(found[k])) {
          currentContext[currentContextIndex++] = found[k];
        }
      }
      continue;
    }
    
    if (!currentContext[0]){return;}
    
    // If we get here, token is JUST an element (not a class or ID selector)
    tagName = token;
    var found = new Array;
    var foundCount = 0;
    for (var h = 0; h < currentContext.length; h++) {
      var elements = currentContext[h].getElementsByTagName(tagName);
      for (var j = 0; j < elements.length; j++) {found[foundCount++] = elements[j];}
    }
    currentContext = found;
  }
  return currentContext;
}

/* That revolting regular expression explained 
/^(\w+)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/
  \---/  \---/\-------------/    \-------/
    |      |         |               |
    |      |         |           The value
    |      |    ~,|,^,$,* or =
    |   Attribute 
   Tag
*/