// global variables //
var TIMER = 5;
var SPEED = 10;
var WRAPPER = 'dialogContent';
var TimeOutObj = null;

// calculate the current window width //
function pageWidth() {
    return $("body").width();
}

// calculate the current window height //
function pageHeight() {
    return $("body").height();
}

// 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, autohide) {
    //autohide = autohide;
    if (!type) {
        type = 'error';
    }
    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 + 100;
    var leftposition = width - (dialogwidth + 10);

    //var fromRightOfPageToLeftofDialog = (width - 950 /*page width*/) / 2 - dialogwidth - 20;
    //if (fromRightOfPageToLeftofDialog > 0)
        //leftposition -= fromRightOfPageToLeftofDialog / 2;
    
    dialog.style.top = topposition + "px";
    dialog.style.left = leftposition + "px";
    
    dialogheader.className = type + "header";
    dialogtitle.innerHTML = title;
    dialogcontent.className = type;
    dialogcontent.innerHTML = message;
    var content = document.getElementById(WRAPPER);
    dialogmask.style.height = content.offsetHeight + 'px';
    dialog.timer = setInterval("fadeDialog(1)", TIMER);
    if (autohide) {
        dialogclose.style.visibility = "hidden";
        clearTimeout(TimeOutObj);
        TimeOutObj = window.setTimeout("hideDialog()", (autohide * 1000));
    } else {
        dialogclose.style.visibility = "visible";
    }
}

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

// fade-in the dialog box //
function fadeDialog(flag) {
    if (flag == null) {
        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;
    } else if (value <= 1) {
        dialog.style.visibility = "hidden";
        document.getElementById('dialog-mask').style.visibility = "hidden";
        clearInterval(dialog.timer);
    }
}