Hi, My use case; Each time a document is opened display a random image from a index of 25 The images are located on a external website I've tried the following step 0: I've a document Sandbox.Try step 1: I've added a object of type XWiki.JavaScriptExtension to the page in name: random-header.js in Code: // JavaScript Document images = new Array(25); images[0] = '<img src="http://www.cdlsusa.org/images/interiors/1.jpg" >' images[1] = '<img src="http://www.cdlsusa.org/images/interiors/2.jpg" >' images[2] = '<img src="http://www.cdlsusa.org/images/interiors/3.jpg" >' images[3] = '<img src="http://www.cdlsusa.org/images/interiors/4.jpg" >' images[4] = '<img src="http://www.cdlsusa.org/images/interiors/5.jpg" >' images[5] = '<img src="http://www.cdlsusa.org/images/interiors/6.jpg" >' images[6] = '<img src="http://www.cdlsusa.org/images/interiors/7.jpg" >' images[7] = '<img src="http://www.cdlsusa.org/images/interiors/8.jpg" >' images[8] = '<img src="http://www.cdlsusa.org/images/interiors/9.jpg" >' images[9] = '<img src="http://www.cdlsusa.org/images/interiors/10.jpg" >' images[10] = '<img src="http://www.cdlsusa.org/images/interiors/11.jpg" >' images[11] = '<img src="http://www.cdlsusa.org/images/interiors/12.jpg" >' images[12] = '<img src="http://www.cdlsusa.org/images/interiors/13.jpg" >' images[13] = '<img src="http://www.cdlsusa.org/images/interiors/14.jpg" >' images[14] = '<img src="http://www.cdlsusa.org/images/interiors/15.jpg" >' images[15] = '<img src="http://www.cdlsusa.org/images/interiors/16.jpg" >' images[16] = '<img src="http://www.cdlsusa.org/images/interiors/17.jpg" >' images[17] = '<img src="http://www.cdlsusa.org/images/interiors/18.jpg" >' images[18] = '<img src="http://www.cdlsusa.org/images/interiors/19.jpg" >' images[19] = '<img src="http://www.cdlsusa.org/images/interiors/20.jpg" >' images[20] = '<img src="http://www.cdlsusa.org/images/interiors/21.jpg" >' images[21] = '<img src="http://www.cdlsusa.org/images/interiors/22.jpg" >' images[22] = '<img src="http://www.cdlsusa.org/images/interiors/23.jpg" >' images[23] = '<img src="http://www.cdlsusa.org/images/interiors/24.jpg" >' images[24] = '<img src="http://www.cdlsusa.org/images/interiors/25.jpg" >' images[25] = '<img src="http://www.cdlsusa.org/images/interiors/26.jpg" >' index = Math.floor(Math.random() * images.length); in use this extension: on demand parse content: no caching policy: long step 2 In the page i've added the following {{velocity}} $xwiki.jsx.use('Sandbox.Try') {{/velocity}} {{html wiki="false"}}<!-- start main image div & javascript for home page --> <div id="interior-pg-main-img"> <div style="float: left;"> <script type="text/javascript"> document.write(images[index]); </script> </div> </div> <!-- end main image div & javascript for home page --> {{/html}} step 3: Empty page ;-( Any suggestions how to approach this more effective Gerritjan _______________________________________________ users mailing list users(a)xwiki.org http://lists.xwiki.org/mailman/listinfo/users

On Fri, Apr 1, 2011 at 11:31, Gerritjan Koekkoek &lt;gerritjankoekkoek(a)gmail.com&gt; wrote: If you need to pick a random image when the document is loaded I don't understand why you are doing that using javascript. Would be much easier to do it server side. Now it's maybe not that easy to do random number generation in velocity,looks like there is no $randomtool by default.

-- Thomas Mortagne