// mootools replacement

function getElement(el,tagName,className){
   var subEl = el.getElementsByTagName(tagName);
   var el;
   notFound = true;   
   if(null!=subEl){  
    for (var i = 0; i < subEl.length && notFound; i++) { 
       if(hasClass(subEl[i],className)){
           el=subEl[i];
           notFound = false;           
       }
     }     
   }
 return el;
}
function setOpacity(testObj,val){
   if(null!=testObj){
     value = parseFloat(val);
     if(value==0){
       if(testObj.style.visibility!="hidden"){
         testObj.style.visibility="hidden";}
     }else{
        if(testObj.style.visibility!="visible"){testObj.style.visibility="visible";}
     }
      if(!testObj.currentStyle||!testObj.currentStyle.hasLayout){
        testObj.style.zoom=1;
      }
      if(document.all){      
         testObj.style.filter=(value==1)?"":"alpha(opacity="+value*100+")";     
      }
        testObj.style.opacity=value;
   }
}

function getNextSibling(startBrother){
  endBrother=startBrother.nextSibling;
  while(null!= endBrother && endBrother.nodeType !=1 ){
    endBrother = endBrother.nextSibling;
  }
  return endBrother;
} 

function injectAfter(element,targetElement){
  var nextElement = getNextSibling(targetElement);
  if(!nextElement){
   targetElement.parentNode.appendChild(element);
   }else{
    targetElement.parentNode.insertBefore(element,nextElement);
  }
}
function addEvent(element,eventName,func){
   if(element.addEventListener){
      element.addEventListener(eventName,func,false);
    }
   if(element.attachEvent){
      element.attachEvent('on'+ eventName,func);
    }
}

function stopEvent(event){
  if(event.stopPropagation){
    event.stopPropagation();
  }else{
      event.cancelBubble=true;
  }
  if(event.preventDefault){
    event.preventDefault();
  }else{
    event.returnValue=false;
  }
}

function getScrollHeight(element){
   var scrollHeight;
     if(element.ie){
       scrollHeight =  Math.max(document.documentElement.offsetHeight,document.documentElement.scrollHeight);
     }else if(this.webkit){
      scrollHeight = document.body.scrollHeight;
     }else{
      scrollHeight=document.documentElement.scrollHeight;
    }
   return scrollHeight + 'px';
}

function getHeight(element){
  if(this.webkit419){  
   return element.innerHeight;
  }
  if(this.opera){
   return document.body.clientHeight;
  }
  return document.documentElement.clientHeight;
}
function getSize(element){
  return{scroll:{x:element.scrollLeft,y:element.scrollTop},
         size:{x:element.offsetWidth,y:element.offsetHeight},
         scrollSize:{x:element.scrollWidth,y:element.scrollHeight}};
}

function getElementAbsolutePosition(e) {
	var ret = new Object();
	ret.x = e.offsetLeft;
	ret.y = e.offsetTop;
	var e2 = e;
	while (e2 = e2.offsetParent) {
		ret.x += e2.offsetLeft;
		ret.y += e2.offsetTop;
	}
	return ret;
}

function elementsIntersect(e1, e2) {
	var pos1 = getElementAbsolutePosition(e1);
	var pos2 = getElementAbsolutePosition(e2);

	if (pos1.x > pos2.x + e2.offsetWidth) {
		return false;
	}
	if (pos1.x + e1.offsetWidth < pos2.x) {
		return false;
	}
	if (pos1.y > pos2.y + e2.offsetHeight) {
		return false;
	}
	if (pos1.y + e1.offsetHeight < pos2.y) {
		return false;
	}
	return true;
}

/* Added to replace getCoordinates of mootools.js*/

function getCoordinates(element){
 var elementPosition = getElementAbsolutePosition(element);
 var elementCoordinates={width:element.offsetWidth,
        height:element.offsetHeight,
        left:elementPosition.x,
        top:elementPosition.y};
  elementCoordinates.right=elementCoordinates.left+elementCoordinates.width;
  elementCoordinates.bottom=elementCoordinates.top+elementCoordinates.height;
  return elementCoordinates;
 }

function getEventSourceElement(e)
{
  var targ;
   if (!e) var e = window.event;
	 if (e.target){
     targ = e.target;   
   } else if (e.srcElement){ 
     targ = e.srcElement;   
   }	
  if(targ){
   if (targ.nodeType == 3){// defeat Safari bug		
       targ = targ.parentNode;       
     } 
   }   
   return targ;
}


function setDisplayByClass(classToDisplayMap) {
	var elements = getAllChildren(document);
    for (var i = 0; i < elements.length; i++) {
    	var el = elements[i];
    	var cl = el.className;
    	if (cl) {
	    	var nd = classToDisplayMap[cl];
	    	if (nd) {
    			el.style.display = nd;
	    	} else if (cl.indexOf(" ") > -1){
	    		var cls = cl.split(" ");
	    		for (var j = 0; j < cls.length; j++) {
	    			cl = cls[j];
	    			nd = classToDisplayMap[cl];
	    			if (nd) {
    	    			el.style.display = nd;
	    			}
	    		}
	    	}
    	}
	}
}

function setDisplayForMatchingElements(className, newDisplay) {
	var elements = document.getElementsBySelector(className);
	     for (var i = 0; i < elements.length; i++) {
		   elements[i].style.display = newDisplay;
		}  
}

/* Trims the leading and trailing spaces off a string. */
 function trim(name){
  return name.replace(/^\s+|\s+$/g,"");

}
/*Removes all extraneous whitespace from a string and trims it (String:trim).*/

 function clean(name)
 {
    return trim(name.replace(/\s{2,}/g," "));
 }
  
/**  removes the class from the element **/

 function removeClass(element,className)
 {
  var regExp = new RegExp("(^|\\s)"+className+"(?:\\s|$)");  
  element.className= clean(element.className.replace(regExp,"$1"));
 }
 function addClass(element,className)
  {
     if(!hasClass(element,className)){
      element.className=clean(element.className+" "+className);
     }
  }
  
 function hasClass(element,className) 
 {
    return (element != null && element.className.indexOf(className) != -1);
 }

/* document.getElementsBySelector(selector)
   - returns an array of element objects from the current document
     matching the CSS selector. Selectors can contain element names, 
     class names and ids and can be nested. For example:
     
       elements = document.getElementsBySelect('div#main p a.external')
     
     Will return an array of all 'a' elements with 'external' in their 
     class attribute that are contained inside 'p' elements that are 
     contained inside the 'div' element which has id="main"

   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) {
  // Returns all children of element. Workaround required for IE5/Windows. Ugh.
  return e.all ? e.all : e.getElementsByTagName('*');
}

document.getElementsBySelector = function(selector) {
  // Attempt to fail gracefully in lesser browsers
  if (!document.getElementsByTagName) {
    return new Array();
  }
  // Split selector in to tokens
  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) {
      // Token is an ID selector
      var bits = token.split('#');
      var tagName = bits[0];
      var id = bits[1];
      var element = document.getElementById(id);
      if (tagName && element.nodeName.toLowerCase() != tagName) {
        // tag with that ID not found, return false
        return new Array();
      }
      // Set currentContext to contain just this element
      currentContext = new Array(element);
      continue; // Skip to next token
    }
    if (token.indexOf('.') > -1) {
      // Token contains a class selector
      var bits = token.split('.');
      var tagName = bits[0];
      var className = bits[1];
      if (!tagName) {
        tagName = '*';
      }
      // Get elements matching tag, filter them for class selector
      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; // Skip to next token
    }
    // Code to deal with attribute selectors
    if (token.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/)) {
      var tagName = RegExp.$1;
      var attrName = RegExp.$2;
      var attrOperator = RegExp.$3;
      var attrValue = RegExp.$4;
      if (!tagName) {
        tagName = '*';
      }
      // Grab all of the tagName elements within current context
      var found = new Array;
      var foundCount = 0;
      for (var h = 0; h < currentContext.length; h++) {
        var elements;
        if (tagName == '*') {
            elements = getAllChildren(currentContext[h]);
        } else {
            elements = currentContext[h].getElementsByTagName(tagName);
        }
        for (var j = 0; j < elements.length; j++) {
          found[foundCount++] = elements[j];
        }
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      var checkFunction; // This function will be used to filter the elements
      switch (attrOperator) {
        case '=': // Equality
          checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
          break;
        case '~': // Match one of space seperated words 
          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
          break;
        case '|': // Match start with value followed by optional hyphen
          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
          break;
        case '^': // Match starts with value
          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
          break;
        case '$': // 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];
        }
      }
      // alert('Attribute Selector: '+tagName+' '+attrName+' '+attrOperator+' '+attrValue);
      continue; // Skip to next token
    }
    // 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
*/