/**
 * addEvent written by Dean Edwards, 2005
 * with input from Tino Zijdel
 *
 * http://dean.edwards.name/weblog/2005/10/add-event/
 **/
function addEvent(element, type, handler)
{
   if(element == null)
   {
      alert("Null element; event " + type + "; function:\n" + handler);
   }
	// assign each event handler a unique ID
	if (!handler.$$guid) handler.$$guid = addEvent.guid++;
	
	// create a hash table of event types for the element
	if (!element.events) element.events = {};
	
	// create a hash table of event handlers for each element/event pair
	var handlers = element.events[type];
	if (!handlers)
	{
		handlers = element.events[type] = {};
		
		// store the existing event handler (if there is one)
		if (element["on" + type])
		{
			handlers[0] = element["on" + type];
		}
	}
	
	// store the event handler in the hash table
	handlers[handler.$$guid] = handler;
	
	// assign a global event handler to do all the work
	element["on" + type] = handleEvent;
};

// a counter used to create unique IDs
addEvent.guid = 1;

function removeEvent(element, type, handler) {
	// delete the event handler from the hash table
	if (element.events && element.events[type]) {
		element.events[type][handler.$$guid] = undefined;
	}
};

function handleEvent(event) {
	var returnValue = true;
	// grab the event object (IE uses a global event object)
	event = event || fixEvent(window.event);
	// get a reference to the hash table of event handlers
	var handlers = this.events[event.type];
	// execute each event handler
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
};

function fixEvent(event) {
	// add W3C standard event methods
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
};

fixEvent.preventDefault = function() {
	this.returnValue = false;
};
fixEvent.stopPropagation = function() {
	this.cancelBubble = true;
};

// end from Dean Edwards

function getStyleBySelector( selector )
{
   var sheetList = document.styleSheets;
   var ruleList;
   var i, j;
   
   /* look through stylesheets in reverse order that they appear in the document */
   for (i=sheetList.length-1; i  >= 0; i--)
   {
      ruleList = sheetList[i].cssRules;
      for (j=0; j < ruleList.length; j++)
      {
    //     alert(ruleList[j].selectorText);
         if (ruleList[j].type == CSSRule.STYLE_RULE && ruleList[j].selectorText == selector)
         {
            return ruleList[j].style;
         }   
      }
   }
   
   return null;
}

function findPos(obj) {
   var curleft = curtop = 0;
   if (obj.offsetParent) {
      curleft = obj.offsetLeft
      curtop = obj.offsetTop
      while (obj = obj.offsetParent) {
         curleft += obj.offsetLeft
         curtop += obj.offsetTop
      }
   }
   return [curleft,curtop];
}

/**
 * Creates an Element for insertion into the DOM tree.
 * From http://simon.incutio.com/archive/2003/06/15/javascriptWithXML
 *
 * @param element the element type to be created.
 *          e.g. ul (no angle brackets)
 **/
function createElement(element) {
   if (typeof document.createElementNS != 'undefined') {
      return document.createElementNS('http://www.w3.org/1999/xhtml', element);
   }
   if (typeof document.createElement != 'undefined') {
      return document.createElement(element);
   }
   return false;
}

/**
 * "targ" is the element which caused this function to be called
 * from http://www.quirksmode.org/js/events_properties.html
 **/
function getEventTarget(e) {
   var targ;
   if (!e) {
      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;
}

var myPopupWindow = '';
function openPopupWindow(url, name, width, height)
{
    //Remove special characters from name
    name = name.replace(/\/|\-|\./gi, "");

    //Remove whitespaces from name
    var whitespace = new RegExp("\\s","g");
    name = name.replace(whitespace,"");

    //If it is already open
    if (!myPopupWindow.closed && myPopupWindow.location)
    {
        myPopupWindow.location.href = url;
    }
    else
    {
        myPopupWindow= window.open(url, name, "location=no, scrollbars=yes, resizable=yes, toolbar=no, menubar=no, width=" + width + ", height=" + height );
        if (!myPopupWindow.opener) myPopupWindow.opener = self;
    }

     //If my main window has focus - set it to the popup
    if (window.focus) {myPopupWindow.focus()}
}