var popup, displayBoxPos, isWorking, divobj, req;
isWorking = false;

function GetPopupDivByName()
{
    var popup = document.getElementById('popupplaceholder');
    if(popup==null)
    {
        popup = document.body.insertBefore(document.createElement("div"), document.body.firstChild);
        popup.style.position = 'absolute';
        popup.style.display = 'block';
        popup.style.zIndex = 100;
        popup.id = 'popupplaceholder';
    }
    return popup;
}

function CallbackReload(url)
{
    if(isWorking) return;
    isWorking = true;
    
    req = createXMLHTTPObject();
	req.open("GET", url, true);
	req.onreadystatechange = ReloadPage;
	req.send(null);
	return true;
}


function CallbackServerAction(tmpl, nameValuePairs)
{
   if(isWorking) return;
   isWorking = true;

   req = createXMLHTTPObject();
   var url = "/scripts/ajax/popup_callback.asp?tmpl=" + tmpl + nameValuePairs;
   req.open("GET", url, true);
   req.onreadystatechange = CallbackNoDisplay;
   req.send(null);
   return true;
}

function ReloadPage()
{
	if (req.readyState == 4) 
	{
	    var url = window.location.toString();
	    var len = url.length;
	    if(url.substring(len-1)=="#") url = url.substring(0, len-1);
		window.location = url;
	}
}

function PopupCallback(tmpl, nameValuePairs)
{   
    if(isWorking) return;
    isWorking = true;
    
    req = createXMLHTTPObject();
	var url = "/scripts/ajax/popup_callback.asp?tmpl=" + tmpl + nameValuePairs;
	req.open("GET", url, true);
	req.onreadystatechange = CallbackResponse;
	req.send(null);
	return true;
}

function CallbackNoDisplay()
{

}

function CallbackResponse() 
{	
	if (req.readyState == 4) 
	{		
		var response = eval("(" + req.responseText + ")");
		var template = response.jsonRecord.Template.replace(/"/g, "\"");
        popup = GetPopupDivByName();
        if(popup!=null)
        {
            popup.innerHTML = template;
            popup.style.top = (displayBoxPos[1]+70) + 'px';
            popup.style.left = (displayBoxPos[0]-70) + 'px';
            if(displayBoxPos[0]<100) popup.style.left = '100px';
        }
        isWorking = false;
        divobj.style.cursor = 'default';
	}
}

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

var XMLHttpFactories = [
    function () {return new XMLHttpRequest()},
    function () {return new ActiveXObject("Msxml2.XMLHTTP")},
    function () {return new ActiveXObject("Msxml3.XMLHTTP")},
    function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
    var xmlhttp = false;
    for (var i=0;i<XMLHttpFactories.length;i++) {
        try {
             xmlhttp = XMLHttpFactories[i]();
        }
        catch (e) {
            continue;
        }
        break;
    }
    return xmlhttp;
}

// Determine browser and version.

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;
  }
}

// Global object to hold drag information.

var browser = new Browser();
var dragObj = new Object();
dragObj.zIndex = 0;
var x, y;

function dragStart(event, id) {

  var el;

  // 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.

  findMousePos(event);

  // 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) {

  findMousePos(event);

  // 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) {

  // Clear the drag element global.

  dragObj.elNode = null;

  // 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);
  }
}

function findMousePos(event)
{
    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;
    }
}