var Request = new Object();

Request.send = function(url, method, callback, data, urlencoded) {
	var req;	
	if (window.XMLHttpRequest) {
		req = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		req = new ActiveXObject("Microsoft.XMLHTTP");
	}	
	req.onreadystatechange = function() {
		if (req.readyState == 4) {
			if (req.status < 400) {				
				(method=="POST") ? callback(req) : callback(req,data);
			} else {
				alert("There was a problem loading data :\n" + req.status+ "/" + req.statusText);
			}
		}
	}
	
	if (method=="POST") {
		req.open("POST", url, true);
		if (urlencoded) req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');		
		req.send(data);
	} else {	
		req.open("GET", url, true);
		req.send(null);
	}
	
	return req;
}

Request.sendRawPOST = function(url, data, callback) {
	Request.send(url, "POST", callback, data, false);
}
Request.sendPOST = function(url, data, callback) {
	Request.send(url, "POST", callback, data, true);
}
Request.sendGET = function(url, callback, args) {
	return Request.send(url, "GET", callback, args);
}

function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }

  return elements;
}

if (!window.Element) {
  var Element = new Object();
}

Object.extend = function(destination, source) {
  for (property in source) {
    destination[property] = source[property];
  }
  return destination;
}

Object.extend(Element, {
  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
  }
});

function findPosX(obj) {
	var curleft = 0;
	if (obj && obj.offsetParent) {
		while (obj.offsetParent) {
			curleft += obj.offsetLeft;
			obj = obj.offsetParent;
		}
	} else if (obj && obj.x) curleft += obj.x;
	return curleft;
}

function findPosY(obj) {
	var curtop = 0;
	if (obj && obj.offsetParent) {
		while (obj.offsetParent) {
			curtop += obj.offsetTop;
			obj = obj.offsetParent;
		}
	} else if (obj && obj.y) curtop += obj.y;
	return curtop;
}

function KeyDown(event){
	if (event.keyCode == 13 || event.keyCode==0){
		event.returnValue=false;
		event.cancel = true;
		showPlacesToAdded('search');
	}
}

function convertTextToHTML(s) {
	s = s.replace(/\&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/\n/g, "<br>");
	return s;
}

function convertHTMLToText(s) {
	s = s.replace(/&amp;/g,"&").replace(/&lt;/g,"<").replace(/&gt;/g,">").replace(/<br>/g,"\n");
	return s;
}

function trim(s) {
  while (s.substring(0,1) == ' ') {
    s = s.substring(1,s.length);
  }
  while (s.substring(s.length-1,s.length) == ' ') {
    s = s.substring(0,s.length-1);
  }
  return s;
}

function isNull(s){
	if(trim(s)== ''){
    	return true;
	}else{
		return false;
	}
}

String.prototype.getLength=function() {
	var i,sum=0;
	for(i=0;i<this.length;i++) {
		if ((this.charCodeAt(i)>=0) && (this.charCodeAt(i)<=255)){
			sum++;		
		}else{
			sum+=2;
		}
	}
	return sum;
}

function isInteger(value){  	  
	var pattern = /^(\d|(-\d))\d*$/;	
	if (!pattern.test(value)) {
		return false;
	}else{
		return true;
	}  
}