function slide(src, link, text, target, attr) {
    this.src = src; this.link = link; this.text = text; this.target = target; this.attr = attr; if (document.images) { this.image = new Image(); }
    this.loaded = false; this.load = function() {
        if (!document.images) { return; }
        if (!this.loaded) { this.image.src = this.src; this.loaded = true; } 
    }
    this.hotlink = function() {
        var mywindow; if (!this.link) return; if (this.target) {
            if (this.attr) { mywindow = window.open(this.link, this.target, this.attr); } else { mywindow = window.open(this.link, this.target); }
            if (mywindow && mywindow.focus) mywindow.focus();
        } else { location.href = this.link; } 
    } 
}
function slideshow(slideshowname) {
    this.name = slideshowname; this.repeat = true; this.prefetch = -1; this.image; this.textid; this.textarea; this.timeout = 3000; this.slides = new Array(); this.current = 0; this.timeoutid = 0; this.add_slide = function(slide) {
        var i = this.slides.length; if (this.prefetch == -1) { slide.load(); }
        this.slides[i] = slide;
    }
    this.play = function(timeout) {
        this.pause(); if (timeout) { this.timeout = timeout; }
        if (typeof this.slides[this.current].timeout != 'undefined') { timeout = this.slides[this.current].timeout; } else { timeout = this.timeout; }
        this.timeoutid = setTimeout(this.name + ".loop()", timeout);
    }
    this.pause = function() { if (this.timeoutid != 0) { clearTimeout(this.timeoutid); this.timeoutid = 0; } }
    this.update = function() {
        if (!this.valid_image()) { return; }
        if (typeof this.pre_update_hook == 'function') { this.pre_update_hook(); }
        var slide = this.slides[this.current]; var dofilter = false; if (this.image && typeof this.image.filters != 'undefined' && typeof this.image.filters[0] != 'undefined') { dofilter = true; }
        slide.load(); if (dofilter) {
            if (slide.filter && this.image.style && this.image.style.filter) { this.image.style.filter = slide.filter; }
            this.image.filters[0].Apply();
        }
        this.image.src = slide.image.src; if (dofilter) { this.image.filters[0].Play(); }
        this.display_text(); if (typeof this.post_update_hook == 'function') { this.post_update_hook(); }
        if (this.prefetch > 0) { var next, prev, count; next = this.current; prev = this.current; count = 0; do { if (++next >= this.slides.length) next = 0; if (--prev < 0) prev = this.slides.length - 1; this.slides[next].load(); this.slides[prev].load(); } while (++count < this.prefetch); } 
    }
    this.goto_slide = function(n) {
        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) { var i; if (this.slides.length > 1) { do { i = Math.floor(Math.random() * this.slides.length); } while (i == this.current); this.goto_slide(i); } }
    this.next = function() {
        if (this.current < this.slides.length - 1) { this.current++; } else if (this.repeat) { this.current = 0; }
        this.update();
    }
    this.previous = function() {
        if (this.current > 0) { this.current--; } else if (this.repeat) { this.current = this.slides.length - 1; }
        this.update();
    }
    this.shuffle = function() {
        var i, i2, slides_copy, slides_randomized; slides_copy = new Array(); for (i = 0; i < this.slides.length; i++) { slides_copy[i] = this.slides[i]; }
        slides_randomized = new Array(); do {
            i = Math.floor(Math.random() * slides_copy.length); slides_randomized[slides_randomized.length] = slides_copy[i]; for (i2 = i + 1; i2 < slides_copy.length; i2++) { slides_copy[i2 - 1] = slides_copy[i2]; }
            slides_copy.length--;
        } while (slides_copy.length); this.slides = slides_randomized;
    }
    this.get_text = function() { return (this.slides[this.current].text); }
    this.get_all_text = function(before_slide, after_slide) {
        all_text = ""; 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) {
        if (!text) { text = this.slides[this.current].text; }
        if (this.textarea && typeof this.textarea.value != 'undefined') { this.textarea.value = text; }
        if (this.textid) {
            r = this.getElementById(this.textid); if (!r) { return false; }
            if (typeof r.innerHTML == 'undefined') { return false; }
            r.innerHTML = text;
        } 
    }
    this.hotlink = function() { this.slides[this.current].hotlink(); }
    this.save_position = function(cookiename) {
        if (!cookiename) { cookiename = this.name + '_slideshow'; }
        document.cookie = cookiename + '=' + this.current;
    }
    this.restore_position = function(cookiename) {
        if (!cookiename) { cookiename = this.name + '_slideshow'; }
        var search = cookiename + "="; if (document.cookie.length > 0) { offset = document.cookie.indexOf(search); if (offset != -1) { offset += search.length; end = document.cookie.indexOf(";", offset); if (end == -1) end = document.cookie.length; this.current = parseInt(unescape(document.cookie.substring(offset, end))); } } 
    }
    this.noscript = function() {
        $html = "\n"; 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";
        }
        $html = $html.replace(/\&/g, "&"); $html = $html.replace(/</g, "<"); $html = $html.replace(/>/g, ">"); return ('<pre>' + $html + '</pre>');
    }
    this.loop = function() {
        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 { this.next(); }
        this.play();
    }
    this.valid_image = function() {
        if (!this.image)
        { return false; }
        else { return true; } 
    }
    this.getElementById = function(element_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; } 
    }
    this.set_image = function(imageobject) {
        if (!document.images)
            return; this.image = imageobject;
    }
    this.set_textarea = function(textareaobject) { this.textarea = textareaobject; this.display_text(); }
    this.set_textid = function(textidstr) { this.textid = textidstr; this.display_text(); } 
}