var QQ = {};

Array.prototype.contains = function (element) {
  for (var i = 0; i < this.length; i++) {
    if (this[i] == element) {
      return true;
    }
  }
  return false;
}


String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}


function addEvent(obj, eventType, fn){
	if (obj === undefined || obj === null) return false;
	if (obj.addEventListener){
		try{
			obj.addEventListener(eventType, fn, false);
		}catch (e){}
	}else if (obj.attachEvent){
		obj["e"+eventType+fn] = fn;
		obj[eventType+fn] = function() {obj["e"+eventType+fn](window.event);}
		obj.attachEvent("on"+eventType, obj[eventType+fn]);
	}else{ 
   obj["on"+eventType] = fn;
   return true; 
 } 
}
function addEvents(attribute, value, eventType, fn){
	var objects = objs(attribute,value);
	for (var i=0; i < objects.length; ++i){
		addEvent(objects[i], eventType, fn)
	}
}

function confirmAction(text){
	var confirmed = confirm(text);
	if (confirmed)
		return true;
	else
		return false;
}

// pass a function that can be used at all nodes directly at node with id elementName, fn can use "node" as parameter
function doWithAllNodesIn(elementName,fn){
	
	var sourceNode = getFirstChild(obj(elementName));		
	while (sourceNode != null){
		var node = sourceNode;
		while (node.nodeType != 1){
			node = node.nextSibling;
			if (node == null) break;
		}
		if (node == null) break;
		sourceNode = sourceNode.nextSibling;
		eval(fn);
	}
}

// pass a function that can be used at all nodes with elementName as name, fn can use "node" as parameter
function doWithAllNodes(attribute,value,fn){

  var nodes = objs(attribute,value);
  var nodesLength = nodes.length;
	for(var i = 0;i < nodesLength;i++){
		var node = nodes[i];
		eval(fn);
	}

}

function focusOn(id,selectText){
	try {
		obj(id).focus();
	  if (selectText === true) obj(id).select();
  }catch(e){}
}

// check if the first node is an element node
function getFirstChild(element){
	var x;
	try {x = element.firstChild;}catch(e){}
	if (x != null){
		while (x.nodeType != 1){
			x = x.nextSibling;
			if (x == null) break;
		}
		return x;
	}else{
		return null;
	}
}

function obj(id){
	return document.getElementById(id);
}

// TODO select also elements if value is just part of attribute
function objs(attribute,value){
	if (attribute == undefined) attribute = "class";
  var objs = new Array();
	var providedTags = new Array("span","div","a","p","img","input","form","li","ul");
	for (var tagIndex in providedTags){
		var tags = document.getElementsByTagName(providedTags[tagIndex]);
		var tagsLength = tags.length;
		for (var i=0; i < tagsLength; i++){
      try {
			  if (attribute != "class" && tags[i].getAttribute(attribute).lastIndexOf(value) != -1) objs.push(tags[i]);
				else if (tags[i].className.lastIndexOf(value) != -1) objs.push(tags[i]);
			}catch(e){}			
		}
	}
	return objs;
}

/*
 * popUp
 */
function popUp(page,parameters,setFocus){	
	var win = window.open(page,"_blank",parameters);//, title, parameters);
	
	if (setFocus === undefined)
		win.focus();
}

/**
 * remove an event
 * @param {Object} obj
 * @param {Object} eventType
 * @param {Object} fn
 */
function removeEvent(obj, eventType, fn){
	if (obj.removeEventListener)
		obj.removeEventListener(eventType, fn, false);
	else if (obj.detachEvent){
		try {
			obj.detachEvent("on"+eventType, obj[eventType+fn]);
			obj[eventType+fn] = null;
			obj["e"+eventType+fn] = null;
		}catch (e){}
	}
}

/*
 * toggle an element
 * elementID can be the id or the element itself
 */
function toggle(elementID){
	//alert(elementID.style.display);
	var object = QQ.Element.getObject(elementID);
	try{
		show = (object.style.display == 'none');
		object.style.display = (show ? 'block' : 'none');
	}catch(e){}
}

/*
 * toggle an element, force on or off
 * elementID can be the id or the element itself
 */
function toggleOn(elementID,on){
	if (obj(elementID) != null){
		if (id = obj(elementID)){
			if (on){
				try{id.style.display = 'block';}catch(e){alert(e)}
			}else{
				try{id.style.display = 'none';}catch(e){alert(e)}
			}
		}
	}else{
		if (id = elementID){
			if (on){
				try{id.style.display = 'block';}catch(e){alert(e)}
			}else{
				try{id.style.display = 'none';}catch(e){alert(e)}
			}
		}
	}
}

/**
 * tooltip
 * @param {Object} text
 * @param {Object} className
 * @param {Object} event
 * @param {Object} show
 */
function tooltip(show,text,event,className,offsetX,offsetY){
	
	if (show){
		var tooltip = document.createElement("div");
		tooltip.id = "QQ_Tooltip";
		tooltip.innerHTML = text;
		
		if (className != undefined) tooltip.className = className;
		if (offsetX === undefined) offsetX = 20;		
		if (offsetY === undefined) offsetY = -5;
				
				
		tooltip.style.position = "absolute";
		tooltip.style.left = (event.clientX + offsetX) + QQ.Browser.getScrollPosition('x') + "px";
		tooltip.style.top = (event.clientY + offsetY) + QQ.Browser.getScrollPosition('y') + "px";

		document.body.appendChild(tooltip);
	}else{
		try{document.body.removeChild(obj("QQ_Tooltip"));}catch(e){}
	}
}