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POImage randomizer - jQuery
 

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  1. POImage randomizer - jQuery
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    <p>I am learning jQuery and I want to implement an image randomizer. </p> <p>I have a list of images that need to be displayed. I want them to be displayed randomly.</p> <p>This is what I have implemented, but it sill has not satisfied me: </p> <pre><code>/** Initialisierung*/ function showFotos() { // Nummern der Bilder im Verzeichnis 'images' start_nr = 1; end_nr = 5; // Bilder eventuell vorladen for (i=start_nr; i&lt;=end_nr; i++ ) { preload_img = new Image(); preload_img.src = 'images/' + i + '.jpg'; } // #show-1, #show-2, #show-3 bekommen einen zunächst 'leeren' img-tag mit den Dimensionen der Bilder zugefügt $('#show-1').append('&lt;img src="" width="250" height="250" /&gt;'); // Diese Function wird einmalig aufgerufen und somit Start-Bilder initialisiert randomize(); } // Random Funktion -&gt; kleinster, grösster Wert function randomXToY(minVal,maxVal,floatVal) { var randVal = minVal+(Math.random()*(maxVal-minVal)); return typeof floatVal=='undefined'?Math.round(randVal):randVal. toFixed(floatVal); } // die 'Slotmachine' function randomize() { // die fünf Slots for (i=1; i&lt;=5; i++ ) { // Zufallszahl num = randomXToY(start_nr, end_nr); // Zufallszahl = Bildnummer $('#show-' + i + ' img').attr('src', 'images/' + num + '.jpg'); } </code></pre> <p>This is what I want: </p> <p>When I click on "continue", the next image will be displayed. </p> <p>When I click on back, the further image will be displayed.</p> <p>How can I do it?</p> <p><img src="https://i.stack.imgur.com/Krp3T.jpg" alt="enter image description here"></p> <p>UPDATE!!!! I solved the problem!!!</p> <pre><code>&lt;!doctype html&gt; &lt;html lang="en"&gt; &lt;head&gt; &lt;meta charset="utf-8"&gt; &lt;title&gt;jQuery UI Spinner - Default functionality&lt;/title&gt; &lt;link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css"&gt; &lt;script src="http://code.jquery.com/jquery-1.9.1.js"&gt;&lt;/script&gt; &lt;script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"&gt;&lt;/script&gt; &lt;style type="text/css"&gt; #items { position : relative; width : 400px; height : 200px; top : 20px; left : 20px; } .item { position : absolute; border : 1px solid #ccc; width : 398px; height : 198px; display :none; text-align : right; font-size : 40px; } .first{ display : block; } #controls { margin-top : 30px; } li { display : inline-block; padding : 5px; border : 1px solid #ccc; background-color : #eee; cursor : pointer; } #play { display : none; } .first#item1 { background-image: url(D:/images/images1.jpg); background-repeat: no-repeat; width : 398px; height : 198px; } .item#item2 { background-image: url(D:/images/images2.jpg); background-repeat: no-repeat; width : 398px; height : 198px; } .item#item3 { background-image: url(D:/images/images2.jpg); background-repeat: no-repeat; width : 398px; height : 198px; } .item#item4{ background-image: url(D:/images/images4.jpg); background-repeat: no-repeat; width : 398px; height : 198px; } .item#item5{ background-image: url(D:/images/images5.jpg); background-repeat: no-repeat; width : 398px; height : 198px; } &lt;/style&gt; &lt;script&gt; $(function() { //To store timeout id var timeoutId; var slideImage = function( step ) { if ( step == undefined ) step = 1; //Clear timeout if any clearTimeout ( timeoutId ); //Get current image's index var indx = $('.item:visible').index('.item'); //If step == 0, we don't need to do any fadein our fadeout if ( step != 0 ) { //Fadeout this item $('.item:visible').fadeOut(); } //Increment for next item indx = indx + step ; //Check bounds for next item if ( indx &gt;= $('.item').length ) { indx = 0; } else if ( indx &lt; 0 ) { indx = $('.item').length - 1; } //If step == 0, we don't need to do any fadein our fadeout if ( step != 0 ) { //Fadein next item $('.item:eq(' + indx + ')').fadeIn(); } //Set Itmeout timeoutId = setTimeout ( slideImage, 5000 ); }; //Start sliding slideImage(0); //When clicked on prev $('#prev').click(function() { //slideImage with step = -1 slideImage ( -1 ); }); //When clicked on next $('#next').click(function() { //slideImage with step = 1 slideImage ( 1 ); }); //When clicked on Pause $('#pause').click(function() { //Clear timeout clearTimeout ( timeoutId ); //Hide Pause and show Play $(this).hide(); $('#play').show(); }); //When clicked on Play $('#play').click(function() { //Start slide image slideImage(0); //Hide Play and show Pause $(this).hide(); $('#pause').show(); }); }); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div id='items'&gt; &lt;div id= 'item1' class='item first'&gt;item 1&lt;/div&gt; &lt;div id= 'item2' class='item'&gt;item2&lt;/div&gt; &lt;div id= 'item3' class='item'&gt;item3&lt;/div&gt; &lt;div id= 'item4' class='item'&gt;item4&lt;/div&gt; &lt;div id= 'item5' class='item'&gt;item5&lt;/div&gt; &lt;/div&gt; &lt;ul id='controls'&gt; &lt;li id='prev'&gt; &lt;&lt; Zurueck&lt;/li&gt; &lt;li id='next'&gt;Weiter &gt;&gt; &lt;/li&gt; &lt;/ul&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>It works very good but not with fire fox...I don't know why...</p>
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    1. COWhy are you returning `typeof` from the `randomXToY()` function? I think you just have to return the file name and it should work for you. Also, you're calling this function with only two parameters when it accepts three...not a big issue but you never know. Thoughts?
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    2. CO@theghostofc it is working! But the big problem is to use the continue and back button...
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    3. COIf you want to move forward and back through the images, you need to [build a randomized array](http://stackoverflow.com/questions/2450954/how-to-randomize-shuffle-a-javascript-array).
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