I have two columns of different set of gif images that are clickable for an action. These images are a part of the rows generated in the jsp page. Issue is that when this page loads all the images in one of the columns disappear. And it happens randomly. And the disappearance toggles non-uniformly between the two columns; but the action can be performed when clicked on the disappeared image which appears in the form of a blank square box. But some times its just fine and when it isn't I have to refresh the page to get the images. What might be the problem??