We had been searching for a way to display a 'no image available' image in our web-based catalog for some time. I found a method using simple JavaScript. This should work for any empty RT field displayed through a web browser. It seems that when an RT field is displayed in a form through a browser, domino puts in ecblank.gif when the field is empty as a placeholder in the html. This code reads that and substitutes in the new image in its place. In our case the image is image[0]. This would also work in a loop if there are many RT fields to replace.
Code
Put the following at the bottom of your form. Substitute the name, width and height of your 'no image available' image.
<SCRIPT LANGUAGE=
JavaScript>
<!--
if(document.images[0].src.
indexOf('ecblank.gif')>0) {
window.document.images[0].src =
'http://domain/icons/noboxshot.jpg';
window.document.images[0].height='168'
window.document.images[0].width='126'
}
//-->
</SCRIPT>
