//  dw_event.js version date Apr 2008
//  basic event handling file from dyn-web.com

var dw_Event = {

    add: function(obj, etype, fp, cap) {
        cap = cap || false;
        if (obj.addEventListener) obj.addEventListener(etype, fp, cap);
        else if (obj.attachEvent) obj.attachEvent("on" + etype, fp);
    },

    remove: function(obj, etype, fp, cap) {
        cap = cap || false;
        if (obj.removeEventListener) obj.removeEventListener(etype, fp, cap);
        else if (obj.detachEvent) obj.detachEvent("on" + etype, fp);
    },

    DOMit: function(e) {
        e = e ? e : window.event; // e IS passed when using attachEvent though ...
        if (!e.target) e.target = e.srcElement;
        if (!e.preventDefault) e.preventDefault = function() { e.returnValue = false; return false; }
        if (!e.stopPropagation) e.stopPropagation = function() { e.cancelBubble = true; }
        return e;
    },

    getTarget: function(e) {
        e = dw_Event.DOMit(e); var tgt = e.target;
        if (tgt.nodeType != 1) tgt = tgt.parentNode; // safari...
        return tgt;
    }

}

// Danny Goodman's version (DHTML def ref)
function addLoadEvent(func) {
    var oldQueue = window.onload ? window.onload : function() { };
    window.onload = function() {
        oldQueue();
        func();
    }
}

/*************************************************************************
This code is from Dynamic Web Coding at dyn-web.com
Copyright 2001-2009 by Sharon Paine 
See Terms of Use at www.dyn-web.com/business/terms.php
regarding conditions under which you may use this code.
This notice must be retained in the code as is!
    
Version date: April 2009
supports sequential and random rotation and IE win transition filter
requires dw_event.js 2008 version
*************************************************************************/

// arguments: image id, rotation speed, path to images (optional), 
// new (optional) arguments: for transitions, mouse events and random rotation 
function dw_Rotator(id, speed, path, bTrans, bMouse, bRand) {
    var imgObj = document.getElementById(id);
    if (!imgObj) { // in case name, not id attached to image
        imgObj = document.images[id];
        if (!imgObj) return;
        imgObj.id = id;
    }
    this.id = id; this.speed = speed || 4500; // default speed of rotation
    this.path = path || ""; this.bRand = bRand;
    this.ctr = 0; this.timer = 0; this.imgs = [];
    this._setupLink(imgObj, bMouse);
    this.bTrans = bTrans && typeof imgObj.filters != 'undefined';
    var index = dw_Rotator.col.length; dw_Rotator.col[index] = this;
    this.animString = "dw_Rotator.col[" + index + "]";
}

dw_Rotator.col = []; // hold instances
dw_Rotator.resumeDelay = 400; // onmouseout resume rotation after delay

// mouse events pause/resume
dw_Rotator.prototype._setupLink = function(imgObj, bMouse) {
    if (imgObj.parentNode && imgObj.parentNode.tagName.toLowerCase() == 'a') {
        var parentLink = this.parentLink = imgObj.parentNode;
        if (bMouse) {
            dw_Event.add(parentLink, 'mouseover', dw_Rotator.pause);
            dw_Event.add(parentLink, 'mouseout', dw_Rotator.resume);
        }
    }
}

// so instance can be retrieved by id (as well as by looping through col)
dw_Rotator.getInstanceById = function(id) {
    var len = dw_Rotator.col.length, obj;
    for (var i = 0; i < len; i++) {
        obj = dw_Rotator.col[i];
        if (obj.id && obj.id == id) {
            return obj;
        }
    }
    return null;
}

dw_Rotator.prototype.on_rotate = function() { }

dw_Rotator.prototype.addImages = function() { // preloads images
    var img;
    for (var i = 0; arguments[i]; i++) {
        img = new Image();
        img.src = this.path + arguments[i];
        this.imgs[this.imgs.length] = img;
    }
}

dw_Rotator.prototype.rotate = function() {
    clearTimeout(this.timer); this.timer = null;
    var imgObj = document.getElementById(this.id);
    if (this.bRand) {
        this.setRandomCtr();
    } else {
        if (this.ctr < this.imgs.length - 1) this.ctr++;
        else this.ctr = 0;
    }
    if (this.bTrans) {
        this.doImageTrans(imgObj);
    } else {
        imgObj.src = this.imgs[this.ctr].src;
    }
    this.swapAlt(imgObj); this.prepAction(); this.on_rotate();
    this.timer = setTimeout(this.animString + ".rotate()", this.speed);
}

dw_Rotator.prototype.setRandomCtr = function() {
    var i = 0, ctr;
    do {
        ctr = Math.floor(Math.random() * this.imgs.length);
        i++;
    } while (ctr == this.ctr && i < 6)// repeat attempts to get new image, if necessary
    this.ctr = ctr;
}

dw_Rotator.prototype.doImageTrans = function(imgObj) {
    imgObj.style.filter = 'blendTrans(duration=1)';
    if (imgObj.filters.blendTrans) imgObj.filters.blendTrans.Apply();
    imgObj.src = this.imgs[this.ctr].src;
    imgObj.filters.blendTrans.Play();
}

dw_Rotator.prototype.swapAlt = function(imgObj) {
    if (!imgObj.setAttribute) return;
    if (this.alt && this.alt[this.ctr]) {
        imgObj.setAttribute('alt', this.alt[this.ctr]);
    }
    if (this.title && this.title[this.ctr]) {
        imgObj.setAttribute('title', this.title[this.ctr]);
    }
}

dw_Rotator.prototype.prepAction = function() {
    if (this.actions && this.parentLink && this.actions[this.ctr]) {
        if (typeof this.actions[this.ctr] == 'string') {
            this.parentLink.href = this.actions[this.ctr];
        } else if (typeof this.actions[this.ctr] == 'function') {
            // to execute function when linked image clicked 
            // passes id used to uniquely identify instance  
            // retrieve it using the dw_Rotator.getInstanceById function 
            // so any property of the instance could be obtained for use in the function 
            var id = this.id;
            this.parentLink.href = "javascript: void " + this.actions[this.ctr] + "('" + id + "')";
        }
    }
}

dw_Rotator.prototype.showCaption = function() {
    if (this.captions && this.captionId) {
        var el = document.getElementById(this.captionId);
        if (el && this.captions[this.ctr]) {
            el.innerHTML = this.captions[this.ctr];
        }
    }
}

// Start rotation for all instances 
dw_Rotator.start = function() {
    var len = dw_Rotator.col.length, obj;
    for (var i = 0; i < len; i++) {
        obj = dw_Rotator.col[i];
        if (obj && obj.id) {
            clearTimeout(obj.timer); obj.timer = null;
            obj.timer = setTimeout(obj.animString + ".rotate()", obj.speed);
        }
    }
}

// Stop rotation for all instances 
dw_Rotator.stop = function() {
    var len = dw_Rotator.col.length, obj;
    for (var i = 0; i < len; i++) {
        obj = dw_Rotator.col[i];
        if (obj) { clearTimeout(obj.timer); obj.timer = null; }
    }
}

// for stopping/starting (onmouseover/out)
dw_Rotator.pause = function(e) {
    e = dw_Event.DOMit(e);
    var id = e.target.id;
    var obj = dw_Rotator.getInstanceById(id);
    if (obj) { clearTimeout(obj.timer); obj.timer = null; }
}

dw_Rotator.resume = function(e) {
    e = dw_Event.DOMit(e);
    var id = e.target.id;
    var obj = dw_Rotator.getInstanceById(id);
    if (obj && obj.id) {
        obj.timer = setTimeout(obj.animString + ".rotate()", dw_Rotator.resumeDelay);
    }
}

// calls constructor, addImages, adds actions, etc.
dw_Rotator.setup = function() {
    if (!document.getElementById) return;
    var i, j, rObj, r, imgAr, len;
    for (i = 0; arguments[i]; i++) {
        rObj = arguments[i];
        r = new dw_Rotator(rObj.id, rObj.speed, rObj.path, rObj.bTrans, rObj.bMouse, rObj.bRand);
        try {
            imgAr = rObj.images; len = imgAr.length;
            for (j = 0; j < len; j++) { r.addImages(imgAr[j]); }
            if (rObj.num) r.ctr = rObj.num; // for seq after random selection
            if (rObj.actions && rObj.actions.length == len) {
                r.addProp('actions', rObj.actions);
            }
            if (rObj.alt && rObj.alt.length == len) {
                r.addProp('alt', rObj.alt);
            }
            if (rObj.title && rObj.title.length == len) {
                r.addProp('title', rObj.title);
            }
            if (rObj.captions) {
                r.addProp('captions', rObj.captions);
                r.captionId = rObj.captionId;
                dw_Rotator.addRotateEvent(r, function(id) {
                    return function() { dw_Rotator.getInstanceById(id).showCaption(); }
                } (rObj.id)); // see Crockford js good parts pg 39
            }
        } catch (e) {
            //alert(e.message); 
        }
    }
    dw_Rotator.start();
}

// add to on_rotate for specified instance (r)
// see usage above for captions
dw_Rotator.addRotateEvent = function(r, fp) {
    var old_on_rotate = r.on_rotate;
    r.on_rotate = function() { old_on_rotate(); fp(); }
}

// for adding actions, alt, title
dw_Rotator.prototype.addProp = function(prop, ar) {
    if (!this[prop]) {
        this[prop] = [];
    }
    var len = ar.length;
    for (var i = 0; i < len; i++) {
        this[prop][this[prop].length] = ar[i];
    }
}

/////////////////////////////////////////////////////////////////////
// Reminder about licensing requirements
// See Terms of Use at www.dyn-web.com/business/terms.php
// OK to remove after purchasing a license or if using on a personal site.
function dw_checkAuth() {

}
dw_Event.add(window, 'load', dw_checkAuth);
/////////////////////////////////////////////////////////////////////

/*************************************************************************
This code is from Dynamic Web Coding at dyn-web.com
Copyright 2008-2009 by Sharon Paine 
See Terms of Use at www.dyn-web.com/business/terms.php
regarding conditions under which you may use this code.
This notice must be retained in the code as is!
    
for use with dw_rotator.js
version date: April 2009 (clearTimeout in restart)
oct 1, 2008 (loadNewWin prop added for random)
*************************************************************************/


// display image at random
// rObj: object literal holding data 
function dw_getRandomImage(rObj) {
    var imgAr = rObj.images; if (!imgAr) return;
    var num = Math.floor(Math.random() * imgAr.length);
    var imgStr = ''; var imgFile = imgAr[num];
    rObj.num = num; // hold which img selected
    var path = rObj.path || ''; var id = rObj.id || '';
    var title, alt = '', url;
    // If there are *any* entries for actions, alt or title include them here 
    if (rObj.alt) {
        alt = rObj.alt[num] ? rObj.alt[num] : rObj.alt[0] ? rObj.alt[0] : '';
    }
    if (rObj.title) {
        title = rObj.title[num] ? rObj.title[num] : rObj.title[0] ? rObj.title[0] : '';
    }
    if (rObj.actions) {
        url = rObj.actions[num] ? rObj.actions[num] : rObj.actions[0] ? rObj.actions[0] : null;
    }
    if (url) {
        imgStr += '<a href="';
        imgStr += typeof url == 'string' ? url : 'javascript: void ' + url;
        imgStr += rObj.loadNewWin ? '" target="_blank">' : '">';
    }

    imgStr += '<img src="' + path + imgFile + '"';
    imgStr += id ? ' id="' + id + '"' : '';
    if (title) {
        imgStr += ' title="' + title + '"';
    }
    imgStr += ' alt="' + alt + '" border="0" />';
    if (url) {
        imgStr += '</a>';
    }
    document.write(imgStr); document.close();
}

/////////////////////////////////////////////////////////////////////
//  code to add stop/restart links

dw_Rotator.addControls = function() {
    var els = dw_getElementsByClassName('rotator_controls');
    for (var i = 0; els[i]; i++) {
        var links = els[i].getElementsByTagName('a');
        for (var j = 0; links[j]; j++) {
            if (dw_hasClass(links[j], 'stop')) {
                links[j].onclick = function() { dw_Rotator.stop(); return false }
            } else if (dw_hasClass(links[j], 'start')) {
                links[j].onclick = function() { dw_Rotator.restart(); return false }
            }
        }
        els[i].style.display = 'block';
    }
}

// restart rotation for all instances 
dw_Rotator.restart = function() {
    var len = dw_Rotator.col.length, obj;
    for (var i = 0; i < len; i++) {
        obj = dw_Rotator.col[i];
        if (obj && obj.id) {
            clearTimeout(obj.timer); obj.timer = null;
            obj.timer = setTimeout(obj.animString + ".rotate()", dw_Rotator.resumeDelay);
        }
    }
}

function dw_hasClass(el, cl) {
    var re = new RegExp("\\b" + cl + "\\b", "i");
    if (re.test(el.className)) {
        return true;
    }
    return false;
}

function dw_getElementsByClassName(sClass, sTag, oCont) {
    var result = [], list, i;
    var re = new RegExp("\\b" + sClass + "\\b", "i");
    oCont = oCont ? oCont : document;
    if (document.getElementsByTagName) {
        if (!sTag || sTag == "*") {
            list = oCont.all ? oCont.all : oCont.getElementsByTagName("*");
        } else {
            list = oCont.getElementsByTagName(sTag);
        }
        for (i = 0; list[i]; i++)
            if (re.test(list[i].className)) result.push(list[i]);
    }
    return result;
};


/////////////////////////////////////////////////////////////////////
// example use of function pointer in actions
// id: id by which the instance can be obtained using dw_Rotator.getInstanceById
// (id passed to constructor - id attached to img tag)
function displayImgInSubWin(id) {
    var rObj = dw_Rotator.getInstanceById(id);
    // notice access to properties of the instance available here 
    // file name could be based on the image file name, perhaps to display a larger version
    var file = rObj.imgs[rObj.ctr].src;
    openSubWin(file);
    return false;
}

// arguments: file to open, subwindow name, left, top, width, height, other attributes
// common attributes: (comma separator, no spaces!)
// "resizable,scrollbars,toolbar,location,directories,status,menubar"
// all but url are optional with defaults provided below 
function openSubWin(url, nm, x, y, w, h, atts) {
    nm = nm || "subwindow";
    atts = atts || "menubar,resizable,scrollbars";
    w = w || 600; h = h || 450;
    x = (typeof x == "number") ? x : Math.round((screen.availWidth - w) / 2);
    y = (typeof y == "number") ? y : Math.round((screen.availHeight - h) / 2);
    atts += ',width=' + w + ',height=' + h + ',left=' + x + ',top=' + y;
    var win = window.open(url, nm, atts);
    if (win) {
        if (!win.closed) { win.resizeTo(w, h); win.moveTo(x, y); win.focus(); return false; }
    }
    return true;
}