// code modified from http://drakware.com/?e=3

var xmlhttp;
//var widget_selected="";

var xmlreqs = new Array();
var widget_selected = new Array();

function CXMLReq(freed)
{
	this.freed = freed;
	this.xmlhttp = false;
	if (window.XMLHttpRequest)
	{
		this.xmlhttp = new XMLHttpRequest();
	}
	else if (window.ActiveXObject)
	{
		this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	}
}

function xmlreqGET(obj)
{
	var url = "widgets/" + obj + ".php";
	var pos = -1;
	for (var i=0; i<xmlreqs.length; i++)
	{
		if (xmlreqs[i].freed == 1)
		{
			pos = i;
			break;
		}
	}
	if (pos == -1)
	{
		pos = xmlreqs.length;
		xmlreqs[pos] = new CXMLReq(1);
		widget_selected[pos] = obj;
	}
	
	if (xmlreqs[pos].xmlhttp)
	{
		widget_selected[pos] = obj;
		xmlreqs[pos].freed = 0;
		xmlreqs[pos].xmlhttp.open("GET",url,true);
		xmlreqs[pos].xmlhttp.onreadystatechange = function()
		{
			if (typeof(xmlhttpChange) != 'undefined')
			{
				xmlhttpChange(pos);
			}
		}
		if (window.XMLHttpRequest)
		{
			xmlreqs[pos].xmlhttp.send(null);
		}
		else if (window.ActiveXObject)
		{
			xmlreqs[pos].xmlhttp.send();
		}
	}
} 

function xmlhttpChange(pos)
{
	if (typeof(xmlreqs[pos]) != 'undefined' && xmlreqs[pos].freed == 0 && xmlreqs[pos].xmlhttp.readyState == 4)
	{
		if (xmlreqs[pos].xmlhttp.status == 200 || xmlreqs[pos].xmlhttp.status == 304)
		{
			document.getElementById(widget_selected[pos] + "_inner").innerHTML=xmlreqs[pos].xmlhttp.responseText;
			document.getElementById(widget_selected[pos]).style.display='inline';
			saveThemes();
		}
		else
		{
			handle_error();
		}
		xmlreqs[pos].freed = 1;
	}
}

function showWidget(obj)
{
	//xmlhttp=GetXmlHttpObject();
	//widget_selected=obj;
	xmlreqGET(obj);
	//xmlhttp.onreadystatechange=stateChanged;
	//xmlhttp.open("GET",url,true);
	//xmlhttp.send(null);
	//alert("showWidget");
	if (obj == "widget_twitter")
	{
		getTweets();
	}
	saveThemes();
}

//function stateChanged(obj) {
//if (xmlhttp.readyState==4){
//	xxx = xmlhttp.responseText;
//	document.getElementById( widget_selected + "_inner").innerHTML=xmlhttp.responseText;
//	document.getElementById( widget_selected).style.display='inline';
//	}
//}

function GetXmlHttpObject() {
	
	if (window.XMLHttpRequest){
		return new XMLHttpRequest();
		}
	if (window.ActiveXObject) {
		return new ActiveXObject("Microsoft.XMLHTTP");
		}
	return null;
}

// Determine browser and version.
 
//function hidediv(d) {
//	document.getElementById(d).style.display = "none";
//} 

function Browser() {
 
  var ua, s, i;
 
  this.isIE    = false;
  this.isNS    = false;
  this.version = null;
 
  ua = navigator.userAgent;
 
  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }
 
  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }
 
  // Treat any other "Gecko" browser as NS 6.1.
 
  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}
 
var browser = new Browser();
// Global object to hold drag information.
 
var dragObj = new Object();
dragObj.zIndex = 0;
 
function dragStart(event, id) {
  var el;
  var x, y;
 
  // If an element id was given, find it. Otherwise use the element being
  // clicked on.
  if (id)
    dragObj.elNode = document.getElementById(id);
  else {
    if (browser.isIE)
      dragObj.elNode = window.event.srcElement;
    if (browser.isNS)
      dragObj.elNode = event.target;
 
    // If this is a text node, use its parent element.
 
    if (dragObj.elNode.nodeType == 3)
      dragObj.elNode = dragObj.elNode.parentNode;
  }
  // Get cursor position with respect to the page.
 
  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }
 
  // Save starting positions of cursor and element.
 
  dragObj.cursorStartX = x;
  dragObj.cursorStartY = y;
  dragObj.elStartLeft  = parseInt(dragObj.elNode.style.left, 10);
  dragObj.elStartTop   = parseInt(dragObj.elNode.style.top,  10);

  if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 0;
  if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 0;
 
  // Update element's z-index.
 
  dragObj.elNode.style.zIndex = ++dragObj.zIndex;
 
  // Capture mousemove and mouseup events on the page.
 
  if (browser.isIE) {
    document.attachEvent("onmousemove", dragGo);
    document.attachEvent("onmouseup",   dragStop);
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS) {
    document.addEventListener("mousemove", dragGo,   true);
    document.addEventListener("mouseup",   dragStop, true);
    event.preventDefault();
  }
}
 
function dragGo(event) {
  var x, y;
 
  // Get cursor position with respect to the page.
 
  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }
 
  // Move drag element by the same amount the cursor has moved.
 
  dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
  dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";
 
  if (browser.isIE) {
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS) {
    event.preventDefault();
  }
}
 
function dragStop(event) {
 
  // Stop capturing mousemove and mouseup events.
 
  if (browser.isIE) {
    document.detachEvent("onmousemove", dragGo);
    document.detachEvent("onmouseup",   dragStop);
  }
  if (browser.isNS) {
    document.removeEventListener("mousemove", dragGo,   true);
    document.removeEventListener("mouseup",   dragStop, true);
  }
  saveThemes();
}

function hidediv(obj){
	document.getElementById(obj).style.display="none";
	saveThemes();
}

function showdiv(obj){
	document.getElementById(obj).style.display="inline";
	saveThemes();
}