/*==================================================*
        $Id: slideshow.js,v 1.16 2003/10/14 12:39:00 pat Exp $
        Copyright 2000-2003 Patrick Fitzgerald
        http://slideshow.barelyfitz.com/
        
        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.
        
        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
        GNU General Public License for more details.
        
        You should have received a copy of the GNU General Public License
        along with this program; if not, write to the Free Software
        Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
        *==================================================*/
        
        // There are two objects defined in this file:
        // "slide" - contains all the information for a single slide
        // "slideshow" - consists of multiple slide objects and runs the slideshow
        
        //==================================================
        // slide object
        //==================================================
        function slide(src,link,text,target,attr,alt) {
        // This is the constructor function for the slide object.
        // It is called automatically when you create a new slide object.
        // For example:
        // s = new slide();
        
        // Image URL
        this.src = src;
        
        //image alt tag
        this.alt = alt;
        
        // Link URL
        this.link = link;
        
        // Text to display
        this.text = text;
        
        // Name of the target window ("_blank")
        this.target = target;
        
        // Custom duration for the slide, in milliseconds.
        // This is an optional parameter.
        // this.timeout = 3000
        
        // Attributes for the target window:
        // width=n,height=n,resizable=yes or no,scrollbars=yes or no,
        // toolbar=yes or no,location=yes or no,directories=yes or no,
        // status=yes or no,menubar=yes or no,copyhistory=yes or no
        // Example: "width=200,height=300"
        this.attr = attr;
        
        // Create an image object for the slide
        if (document.images) {
        this.image = new Image();
        }
        
        // Flag to tell when load() has already been called
        this.loaded = false;
        
        //--------------------------------------------------
        this.load = function() {
        // This method loads the image for the slide
        
        if (!document.images) { return; }
        
        if (!this.loaded) {
        this.image.src = this.src;
        this.loaded = true;
        }
        }
        
        //--------------------------------------------------
        this.hotlink = function() {
        // This method jumps to the slide's link.
        // If a window was specified for the slide, then it opens a new window.
        
        var mywindow;
        
        // If this slide does not have a link, do nothing
        if (!this.link) return;
        
        // Open the link in a separate window?
        if (this.target) {
        
        // If window attributes are specified,
        // use them to open the new window
        if (this.attr) {
        mywindow = window.open(this.link, this.target, this.attr);
        
        } else {
        // If window attributes are not specified, do not use them
        // (this will copy the attributes from the originating window)
        mywindow = window.open(this.link, this.target);
        }
        
        // Pop the window to the front
        if (mywindow && mywindow.focus) mywindow.focus();
        
        } else {
        // Open the link in the current window
        location.href = this.link;
        }
        }
        }
        
        //==================================================
        // slideshow object
        //==================================================
        function slideshow( slideshowname ) {
        // This is the constructor function for the slideshow object.
        // It is called automatically when you create a new object.
        // For example:
        // ss = new slideshow("ss");
        
        // Name of this object
        // (required if you want your slideshow to auto-play)
        // For example, "SLIDES1"
        this.name = slideshowname;
        
        // When we reach the last slide, should we loop around to start the
        // slideshow again?
        this.repeat = true;
        
        // Number of images to pre-fetch.
        // -1 = preload all images.
        // 0 = load each image is it is used.
        // n = pre-fetch n images ahead of the current image.
        // I recommend preloading all images unless you have large
        // images, or a large amount of images.
        this.prefetch = n=1;
        
        // IMAGE element on your HTML page.
        // For example, document.images.SLIDES1IMG
        this.image;
        
        // ID of a DIV element on your HTML page that will contain the text.
        // For example, "slides2text"
        // Note: after you set this variable, you should call
        // the update() method to update the slideshow display.
        this.textid;
        
        // TEXTAREA element on your HTML page.
        // For example, document.SLIDES1FORM.SLIDES1TEXT
        // This is a depracated method for displaying the text,
        // but you might want to supply it for older browsers.
        this.textarea;
        
        // Milliseconds to pause between slides.
        // Individual slides can override this.
        this.timeout = 5000;
        
        // Hook functions to be called before and after updating the slide
        // this.pre_update_hook = function() { }
        // this.post_update_hook = function() { }
        
        // These are private variables
        this.slides = new Array();
        this.current = 0;
        this.timeoutid = 0;
        
        //--------------------------------------------------
        // Public methods
        //--------------------------------------------------
        this.add_slide = function(slide) {
        // Add a slide to the slideshow.
        // For example:
        // SLIDES1.add_slide(new slide("s1.jpg", "link.html"))
        
        var i = this.slides.length;
        
        // Prefetch the slide image if necessary
        if (this.prefetch == -1) {
        slide.load();
        }
        
        this.slides[i] = slide;
        }
        
        //--------------------------------------------------
        this.play = function(timeout) {
        // This method implements the automatically running slideshow.
        // If you specify the "timeout" argument, then a new default
        // timeout will be set for the slideshow.
        
        // Make sure we're not already playing
        this.pause();
        
        // If the timeout argument was specified (optional)
        // then make it the new default
        if (timeout) {
        this.timeout = timeout;
        }
        
        // If the current slide has a custom timeout, use it;
        // otherwise use the default timeout
        if (typeof this.slides[ this.current ].timeout != 'undefined') {
        timeout = this.slides[ this.current ].timeout;
        } else {
        timeout = this.timeout;
        }
        
        // After the timeout, call this.loop()
        this.timeoutid = setTimeout( this.name + ".loop()", timeout);
        }
        
        //--------------------------------------------------
        this.pause = function() {
        // This method stops the slideshow if it is automatically running.
        
        if (this.timeoutid != 0) {
        
        clearTimeout(this.timeoutid);
        this.timeoutid = 0;
        
        }
        }
        
        //--------------------------------------------------
        this.update = function() {
        // This method updates the slideshow image on the page
        
        // Make sure the slideshow has been initialized correctly
        if (! this.valid_image()) { return; }
        
        // Call the pre-update hook function if one was specified
        if (typeof this.pre_update_hook == 'function') {
        this.pre_update_hook();
        }
        
        // Convenience variable for the current slide
        var slide = this.slides[ this.current ];
        
        // Determine if the browser supports filters
        var dofilter = false;
        if (this.image &&
        typeof this.image.filters != 'undefined' &&
        typeof this.image.filters[0] != 'undefined') {
        
        dofilter = true;
        
        }
        
        // Load the slide image if necessary
        slide.load();
        
        // Apply the filters for the image transition
        if (dofilter) {
        
        // If the user has specified a custom filter for this slide,
        // then set it now
        if (slide.filter &&
        this.image.style &&
        this.image.style.filter) {
        
        this.image.style.filter = slide.filter;
        
        }
        this.image.filters[0].Apply();
        }
        
        // Update the image.
        this.image.src = slide.image.src;
        
        // Play the image transition filters
        if (dofilter) {
        this.image.filters[0].Play();
        }
        
        // Update the text
        this.display_text();
        
        // Call the post-update hook function if one was specified
        if (typeof this.post_update_hook == 'function') {
        this.post_update_hook();
        }
        
        // Do we need to pre-fetch images?
        if (this.prefetch > 0) {
        
        var next, prev, count;
        
        // Pre-fetch the next slide image(s)
        next = this.current;
        prev = this.current;
        count = 0;
        do {
        
        // Get the next and previous slide number
        // Loop past the ends of the slideshow if necessary
        if (++next >= this.slides.length) next = 0;
        if (--prev < 0) prev = this.slides.length - 1;
        
        // Preload the slide image
        this.slides[next].load();
        this.slides[prev].load();
        
        // Keep going until we have fetched
        // the designated number of slides
        
        } while (++count < this.prefetch);
        }
        }
        
        //--------------------------------------------------
        this.goto_slide = function(n) {
        // This method jumpts to the slide number you specify.
        // If you use slide number -1, then it jumps to the last slide.
        // You can use this to make links that go to a specific slide,
        // or to go to the beginning or end of the slideshow.
        // Examples:
        // onClick="myslides.goto_slide(0)"
        // onClick="myslides.goto_slide(-1)"
        // onClick="myslides.goto_slide(5)"
        
        if (n == -1) {
        n = this.slides.length - 1;
        }
        
        if (n < this.slides.length && n >= 0) {
        this.current = n;
        }
        
        this.update();
        }
        
        
        //--------------------------------------------------
        this.goto_random_slide = function(include_current) {
        // Picks a random slide (other than the current slide) and
        // displays it.
        // If the include_current parameter is true,
        // then
        // See also: shuffle()
        
        var i;
        
        // Make sure there is more than one slide
        if (this.slides.length > 1) {
        
        // Generate a random slide number,
        // but make sure it is not the current slide
        do {
        i = Math.floor(Math.random()*this.slides.length);
        } while (i == this.current);
        
        // Display the slide
        this.goto_slide(i);
        }
        }
        
        
        //--------------------------------------------------
        this.next = function() {
        // This method advances to the next slide.
        
        // Increment the image number
        if (this.current < this.slides.length - 1) {
        this.current++;
        } else if (this.repeat) {
        this.current = 0;
        }
        
        this.update();
        }
        
        
        //--------------------------------------------------
        this.previous = function() {
        // This method goes to the previous slide.
        
        // Decrement the image number
        if (this.current > 0) {
        this.current--;
        } else if (this.repeat) {
        this.current = this.slides.length - 1;
        }
        
        this.update();
        }
        
        
        //--------------------------------------------------
        this.shuffle = function() {
        // This method randomly shuffles the order of the slides.
        
        var i, i2, slides_copy, slides_randomized;
        
        // Create a copy of the array containing the slides
        // in sequential order
        slides_copy = new Array();
        for (i = 0; i < this.slides.length; i++) {
        slides_copy[i] = this.slides[i];
        }
        
        // Create a new array to contain the slides in random order
        slides_randomized = new Array();
        
        // To populate the new array of slides in random order,
        // loop through the existing slides, picking a random
        // slide, removing it from the ordered list and adding it to
        // the random list.
        
        do {
        
        // Pick a random slide from those that remain
        i = Math.floor(Math.random()*slides_copy.length);
        
        // Add the slide to the end of the randomized array
        slides_randomized[ slides_randomized.length ] =
        slides_copy[i];
        
        // Remove the slide from the sequential array,
        // so it cannot be chosen again
        for (i2 = i + 1; i2 < slides_copy.length; i2++) {
        slides_copy[i2 - 1] = slides_copy[i2];
        }
        slides_copy.length--;
        
        // Keep going until we have removed all the slides
        
        } while (slides_copy.length);
        
        // Now set the slides to the randomized array
        this.slides = slides_randomized;
        }
        
        
        //--------------------------------------------------
        this.get_text = function() {
        // This method returns the text of the current slide
        
        return(this.slides[ this.current ].text);
        }
        
        
        //--------------------------------------------------
        this.get_all_text = function(before_slide, after_slide) {
        // Return the text for all of the slides.
        // For the text of each slide, add "before_slide" in front of the
        // text, and "after_slide" after the text.
        // For example:
        // document.write("<ul>");
        // document.write(s.get_all_text("<li>","\n"));
        // document.write("<\/ul>");
        
        all_text = "";
        
        // Loop through all the slides in the slideshow
        for (i=0; i < this.slides.length; i++) {
        
        slide = this.slides[i];
        
        if (slide.text) {
        all_text += before_slide + slide.text + after_slide;
        }
        
        }
        
        return(all_text);
        }
        
        
        //--------------------------------------------------
        this.display_text = function(text) {
        // Display the text for the current slide
        
        // If the "text" arg was not supplied (usually it isn't),
        // get the text from the slideshow
        if (!text) {
        text = this.slides[ this.current ].text;
        }
        
        // If a textarea has been specified,
        // then change the text displayed in it
        if (this.textarea && typeof this.textarea.value != 'undefined') {
        this.textarea.value = text;
        }
        
        // If a text id has been specified,
        // then change the contents of the HTML element
        if (this.textid) {
        
        r = this.getElementById(this.textid);
        if (!r) { return false; }
        if (typeof r.innerHTML == 'undefined') { return false; }
        
        // Update the text
        r.innerHTML = text;
        }
        }
        
        
        //--------------------------------------------------
        this.hotlink = function() {
        // This method calls the hotlink() method for the current slide.
        
        this.slides[ this.current ].hotlink();
        }
        
        
        //--------------------------------------------------
        this.save_position = function(cookiename) {
        // Saves the position of the slideshow in a cookie,
        // so when you return to this page, the position in the slideshow
        // won't be lost.
        
        if (!cookiename) {
        cookiename = this.name + '_slideshow';
        }
        
        document.cookie = cookiename + '=' + this.current;
        }
        
        
        //--------------------------------------------------
        this.restore_position = function(cookiename) {
        // If you previously called slideshow_save_position(),
        // returns the slideshow to the previous state.
        
        //Get cookie code by Shelley Powers
        
        if (!cookiename) {
        cookiename = this.name + '_slideshow';
        }
        
        var search = cookiename + "=";
        
        if (document.cookie.length > 0) {
        offset = document.cookie.indexOf(search);
        // if cookie exists
        if (offset != -1) {
        offset += search.length;
        // set index of beginning of value
        end = document.cookie.indexOf(";", offset);
        // set index of end of cookie value
        if (end == -1) end = document.cookie.length;
        this.current = parseInt(unescape(document.cookie.substring(offset, end)));
        }
        }
        }
        
        
        //--------------------------------------------------
        this.noscript = function() {
        // This method is not for use as part of your slideshow,
        // but you can call it to get a plain HTML version of the slideshow
        // images and text.
        // You should copy the HTML and put it within a NOSCRIPT element, to
        // give non-javascript browsers access to your slideshow information.
        // This also ensures that your slideshow text and images are indexed
        // by search engines.
        
        $html = "\n";
        
        // Loop through all the slides in the slideshow
        for (i=0; i < this.slides.length; i++) {
        
        slide = this.slides[i];
        
        $html += '<P>';
        
        if (slide.link) {
        $html += '<a href="' + slide.link + '">';
        }
        
        $html += '<img src="' + slide.src + '" ALT="slideshow image">';
        
        if (slide.link) {
        $html += "<\/a>";
        }
        
        if (slide.text) {
        $html += "<BR>\n" + slide.text;
        }
        
        $html += "<\/P>" + "\n\n";
        }
        
        // Make the HTML browser-safe
        $html = $html.replace(/\&/g, "&amp;" );
        $html = $html.replace(/</g, "&lt;" );
        $html = $html.replace(/>/g, "&gt;" );
        
        return('<pre>' + $html + '</pre>');
        }
        
        
        //==================================================
        // Private methods
        //==================================================
        
        //--------------------------------------------------
        this.loop = function() {
        // This method is for internal use only.
        // This method gets called automatically by a JavaScript timeout.
        // It advances to the next slide, then sets the next timeout.
        // If the next slide image has not completed loading yet,
        // then do not advance to the next slide yet.
        
        // Make sure the next slide image has finished loading
        if (this.current < this.slides.length - 1) {
        next_slide = this.slides[this.current + 1];
        if (next_slide.image.complete == null || next_slide.image.complete) {
        this.next();
        }
        } else { // we're at the last slide
        this.next();
        }
        
        // Keep playing the slideshow
        this.play( );
        }
        
        
        //--------------------------------------------------
        this.valid_image = function() {
        // Returns 1 if a valid image has been set for the slideshow
        
        if (!this.image)
        {
        return false;
        }
        else {
        return true;
        }
        }
        
        //--------------------------------------------------
        this.getElementById = function(element_id) {
        // This method returns the element corresponding to the id
        
        if (document.getElementById) {
        return document.getElementById(element_id);
        }
        else if (document.all) {
        return document.all[element_id];
        }
        else if (document.layers) {
        return document.layers[element_id];
        } else {
        return undefined;
        }
        }
        
        
        //==================================================
        // Deprecated methods
        // I don't recommend the use of the following methods,
        // but they are included for backward compatibility.
        // You can delete them if you don't need them.
        //==================================================
        
        //--------------------------------------------------
        this.set_image = function(imageobject) {
        // This method is deprecated; you should use
        // the following code instead:
        // s.image = document.images.myimagename;
        // s.update();
        
        if (!document.images)
        return;
        this.image = imageobject;
        }
        
        //--------------------------------------------------
        this.set_textarea = function(textareaobject) {
        // This method is deprecated; you should use
        // the following code instead:
        // s.textarea = document.form.textareaname;
        // s.update();
        
        this.textarea = textareaobject;
        this.display_text();
        }
        
        //--------------------------------------------------
        this.set_textid = function(textidstr) {
        // This method is deprecated; you should use
        // the following code instead:
        // s.textid = "mytextid";
        // s.update();
        
        this.textid = textidstr;
        this.display_text();
        }
        }
        
        
        SLIDES = new slideshow("SLIDES");
        SLIDES.timeout = 5000;
        SLIDES.prefetch = n=1;
        SLIDES.repeat = true;

//-----------------------
//change image details here
//-------------------------
s = new slide();
s.src = "http://actionbag.com/images/art/Valentine.jpg";
s.text = unescape("");
s.link = "product.aspx?p=SP-R804010";
s.target = "";
s.attr = "width:450,height:250";
s.filter = "";
SLIDES.add_slide(s);


//-----------------------
//change image details here
//-------------------------
s = new slide();
s.src = "http://actionbag.com/images/art/QR_Codes.jpg";
s.text = unescape("");
s.link = "article.aspx?a=1111";
s.target = "";
s.attr = "width:450,height:250";
s.filter = "";
SLIDES.add_slide(s);


//-----------------------
//change image details here
//-------------------------
s = new slide();
s.src = "http://actionbag.com/images/art/Red_Dress_Hero2011.jpg";
s.text = unescape("");
s.link = "article.aspx?a=144";
s.target = "";
s.attr = "width:450,height:250";
s.filter = "";
SLIDES.add_slide(s);


//-----------------------
//change image details here
//-------------------------
s = new slide();
s.src = "http://actionbag.com/images/art/GetConnected2011.jpg";
s.text = unescape("");
s.link = "/article.asp?a=114";
s.target = "";
s.attr = "width:450,height:250";
s.filter = "";
SLIDES.add_slide(s);