/*
Author: mg12
Update: 2008/05/05
Author URI: http://www.neoease.com/
*/
(function() {

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

function setStyleDisplay(id, status) {
	$(id).style.display = status;
}

function goTop(a, t) {
	a = a || 0.1;
	t = t || 16;

	var x1 = 0;
	var y1 = 0;
	var x2 = 0;
	var y2 = 0;
	var x3 = 0;
	var y3 = 0;

	if (document.documentElement) {
		x1 = document.documentElement.scrollLeft || 0;
		y1 = document.documentElement.scrollTop || 0;
	}
	if (document.body) {
		x2 = document.body.scrollLeft || 0;
		y2 = document.body.scrollTop || 0;
	}
	var x3 = window.scrollX || 0;
	var y3 = window.scrollY || 0;

	var x = Math.max(x1, Math.max(x2, x3));
	var y = Math.max(y1, Math.max(y2, y3));

	var speed = 1 + a;
	window.scrollTo(Math.floor(x / speed), Math.floor(y / speed));
	if(x > 0 || y > 0) {
		var f = "MGJS.goTop(" + a + ", " + t + ")";
		window.setTimeout(f, t);
	}
}

function switchTab(showPanels, hidePanels, activeTab, activeClass, fadeTab, fadeClass) {
	$(activeTab).className = activeClass;
	$(fadeTab).className = fadeClass;

	var panel, panelList;
	panelList = showPanels.split(',');
	for (var i = 0; i < panelList.length; i++) {
		var panel = panelList[i];
		if ($(panel)) {
			setStyleDisplay(panel, 'block');
		}
	}
	panelList = hidePanels.split(',');
	for (var i = 0; i < panelList.length; i++) {
		panel = panelList[i];
		if ($(panel)) {
			setStyleDisplay(panel, 'none');
		}
	}
}

function loadCommentShortcut() {
	$('comment').onkeydown = function (moz_ev) {
		var ev = null;
		if (window.event){
			ev = window.event;
		} else {
			ev = moz_ev;
		}
		if (ev != null && ev.ctrlKey && ev.keyCode == 13) {
			$('submit').click();
		}
	}
	$('submit').value += ' (Ctrl+Enter)';
}

function getElementsByClassName(className, tag, parent) {
	parent = parent || document;

	var allTags = (tag == '*' && parent.all) ? parent.all : parent.getElementsByTagName(tag);
	var matchingElements = new Array();

	className = className.replace(/\-/g, '\\-');
	var regex = new RegExp('(^|\\s)' + className + '(\\s|$)');

	var element;
	for (var i = 0; i < allTags.length; i++) {
		element = allTags[i];
		if (regex.test(element.className)) {
			matchingElements.push(element);
		}
	}

	return matchingElements;
}

window['MGJS'] = {};
window['MGJS']['$'] = $;
window['MGJS']['setStyleDisplay'] = setStyleDisplay;
window['MGJS']['goTop'] = goTop;
window['MGJS']['switchTab'] = switchTab;
window['MGJS']['loadCommentShortcut'] = loadCommentShortcut;
window['MGJS']['getElementsByClassName'] = getElementsByClassName;

})();


function geolocate(timezone, cityPrecision, objectVar) {
 
  var api = (cityPrecision) ? "ip-city" : "ip-country";
  var domain = 'api.ipinfodb.com';
  var url = "http://" + domain + "/" + api + "/?key=<your_api_key>&format=json" + "&callback=" + objectVar + ".setGeoCookie";
  var geodata;
  var callbackFunc;
  var JSON = JSON || {};
 
  // implement JSON.stringify serialization
  JSON.stringify = JSON.stringify || function (obj) {
    var t = typeof (obj);
    if (t != "object" || obj === null) {
      // simple data type
      if (t == "string") obj = '"'+obj+'"';
        return String(obj);
    } else {
    // recurse array or object
      var n, v, json = [], arr = (obj && obj.constructor == Array);
      for (n in obj) {
        v = obj[n]; t = typeof(v);
        if (t == "string") v = '"'+v+'"';
        else if (t == "object" && v !== null) v = JSON.stringify(v);
        json.push((arr ? "" : '"' + n + '":') + String(v));
      }
      return (arr ? "[" : "{") + String(json) + (arr ? "]" : "}");
    }
  };
 
  // implement JSON.parse de-serialization
  JSON.parse = JSON.parse || function (str) {
    if (str === "") str = '""';
      eval("var p=" + str + ";");
      return p;
  };
 
  //Check if cookie already exist. If not, query IPInfoDB
  this.checkcookie = function(callback) {
    geolocationCookie = getCookie('geolocation');
    callbackFunc = callback;
    if (!geolocationCookie) {
      getGeolocation();
    } else {
      geodata = JSON.parse(geolocationCookie);
      callbackFunc();
    }
  }
 
  //API callback function that sets the cookie with the serialized JSON answer
  this.setGeoCookie = function(answer) {
    if (answer['statusCode'] == 'OK') {
      JSONString = JSON.stringify(answer);
      setCookie('geolocation', JSONString, 365);
      geodata = answer;
      callbackFunc();
    }
  }
 
  //Return a geolocation field
  this.getField = function(field) {
    try {
      return geodata[field];
    } catch(err) {}
  }
 
  //Request to IPInfoDB
  function getGeolocation() {
    try {
      script = document.createElement('script');
      script.src = url;
      document.body.appendChild(script);
    } catch(err) {}
  }
 
  //Set the cookie
  function setCookie(c_name, value, expire) {
    var exdate=new Date();
    exdate.setDate(exdate.getDate()+expire);
    document.cookie = c_name+ "=" +escape(value) + ((expire==null) ? "" : ";expires="+exdate.toGMTString());
  }
 
  //Get the cookie content
  function getCookie(c_name) {
    if (document.cookie.length > 0 ) {
      c_start=document.cookie.indexOf(c_name + "=");
      if (c_start != -1){
        c_start=c_start + c_name.length+1;
        c_end=document.cookie.indexOf(";",c_start);
        if (c_end == -1) {
          c_end=document.cookie.length;
        }
        return unescape(document.cookie.substring(c_start,c_end));
      }
    }
    return '';
  }
}