// global variables //
var TIMER = 10;
var SPEED = 20;
var WRAPPER = 'content';
var sender;

// calculate the current window width //
function pageWidth() {
  return window.innerWidth != null ? window.innerWidth : document.documentElement && document.documentElement.clientWidth ? document.documentElement.clientWidth : document.body != null ? document.body.clientWidth : null;
}

// calculate the current window height //
function pageHeight() {
  return window.innerHeight != null? window.innerHeight : document.documentElement && document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body != null? document.body.clientHeight : null;
}
// calculate the current window vertical offset //
function topPosition() {
  return typeof window.pageYOffset != 'undefined' ? window.pageYOffset : document.documentElement && document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop ? document.body.scrollTop : 0;
}

// calculate the position starting at the left of the window //
function leftPosition() {
  return typeof window.pageXOffset != 'undefined' ? window.pageXOffset : document.documentElement && document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft ? document.body.scrollLeft : 0;
}

// build/show the dialog box, populate the data and call the fadeDialog function //
function showDialog(title, message, type, control, autohide) {
  if(!TIMER)
    TIMER = 10;
  if(!SPEED)
    SPEED = 20;
  if(!type) {
    type = 'error';
  }
  if(control){
    sender = control;
  }
  var dialog;
  var dialogheader;
  var dialogclose;
  var dialogtitle;
  var dialogcontent;
  var dialogmask;
  if(!document.getElementById('dialog')) {
    dialog = document.createElement('div');
    dialog.id = 'dialog';
    dialogheader = document.createElement('div');
    dialogheader.id = 'dialog-header';
    dialogtitle = document.createElement('div');
    dialogtitle.id = 'dialog-title';
    dialogclose = document.createElement('div');
    dialogclose.id = 'dialog-close'
    dialogcontent = document.createElement('div');
    dialogcontent.id = 'dialog-content';
    dialogmask = document.createElement('div');
    dialogmask.id = 'dialog-mask';
    document.body.appendChild(dialogmask);
    document.body.appendChild(dialog);
    dialog.appendChild(dialogheader);
    dialogheader.appendChild(dialogtitle);
    dialogheader.appendChild(dialogclose);
    dialog.appendChild(dialogcontent);;
    dialogclose.setAttribute('onclick','hideDialog()');
    dialogclose.onclick = hideDialog;
  } else {
    dialog = document.getElementById('dialog');
    dialogheader = document.getElementById('dialog-header');
    dialogtitle = document.getElementById('dialog-title');
    dialogclose = document.getElementById('dialog-close');
    dialogcontent = document.getElementById('dialog-content');
    dialogmask = document.getElementById('dialog-mask');
    dialogmask.style.visibility = "visible";
    dialog.style.visibility = "visible";
  }
  dialog.style.opacity = .00;
  dialog.style.filter = 'alpha(opacity=0)';
  dialog.alpha = 0;
  var width = pageWidth();
  var height = pageHeight();
  var left = leftPosition();
  var top = topPosition();
  var dialogwidth = dialog.offsetWidth;
  var dialogheight = dialog.offsetHeight;
  var topposition = top + (height / 3) - (dialogheight / 2);
  var leftposition = left + (width / 2) - (dialogwidth / 2);
  dialog.style.top = topposition + "px";
  dialog.style.left = leftposition + "px";
  dialogheader.className = type + "header";
  dialogtitle.innerHTML = title;
  dialogcontent.className = type;
  
  var content = document.getElementById(WRAPPER);
  if(content == null)
    content = document.body;
  dialogmask.style.height = content.offsetHeight + 'px';
  dialog.timer = setInterval("fadeDialog(1)", TIMER);
  if(autohide) {
    dialogclose.style.visibility = "hidden";
    window.setTimeout("hideDialog()", (autohide * 1000));
  } else {
    dialogclose.style.visibility = "visible";
  }
/*
  if(type == "prompt"){
    dialogcontent.innerHTML = "";
    dialogcontent.appendChild(getPrompt(message));
  }else{
    dialogcontent.innerHTML = message;
  }
  */
  
  switch(type){
    case 'prompt':
        dialogcontent.innerHTML = "";
        dialogcontent.appendChild(getPrompt(message));
        break;
    case 'prompt1':
        dialogcontent.innerHTML = "";
        dialogcontent.appendChild(getPrompt(message));
        break;
    default:
        dialogcontent.innerHTML = message;
        break;
   }
}

// create prompt layout
function getPrompt(message) {
  
  var layer = document.createElement('div');
  var lmessage = document.createElement('div');
  lmessage.innerHTML = message;
  var yes = document.createElement('div');
  var no = document.createElement('div');
  yes.innerHTML = 'Yes';
  no.innerHTML = 'No';
  lmessage.setAttribute("class","message_confirm");
  lmessage.className = "message_confirm";
  yes.id="div_yes";
  no.id="div_no";
  yes.setAttribute("class","div_buttons");
  yes.className ="div_buttons";
  no.setAttribute("class","div_buttons");
  no.className ="div_buttons";
  
  layer.appendChild(lmessage);
  layer.appendChild(yes);
  layer.appendChild(no);

  yes.setAttribute("onclick","setYes()");
  yes.onclick = setYes;

  no.setAttribute("onclick","setNo()");
  no.onclick = setNo;
  yes.style.visibility = "visible";
  no.style.visibility = "visible";
  return layer;
}


function setYes(){
    hideDialog();
    __doPostBack(sender.name, '');
}
function setNo(){
    hideDialog();
}

// hide the dialog box //
function hideDialog() {
  var dialog = document.getElementById('dialog');
  clearInterval(dialog.timer);
  dialog.timer = setInterval("fadeDialog(0)", TIMER);
}

// fade-in the dialog box //
function fadeDialog(flag) {
  if(flag == null && flag == 0) {
    flag = 1;
  }
  var dialog = document.getElementById('dialog');
  var value;
  if(flag == 1) {
    value = dialog.alpha + SPEED;
  } else {
    value = dialog.alpha - SPEED;
  }
  dialog.alpha = value;
  dialog.style.opacity = (value / 100);
  dialog.style.filter = 'alpha(opacity=' + value + ')';
  if(value >= 99) {
    clearInterval(dialog.timer);
    dialog.timer = null;
    flag = null;
  } else if(value <= 1) {
    dialog.style.visibility = "hidden";
    document.getElementById('dialog-mask').style.visibility = "hidden";
    clearInterval(dialog.timer);
  }
}