Displaying Image on a Form

We have a custom IC12.1 form that will display the item image when the user performs an Inquiry. However, we would like to have the images to display as well when the user inquires using previous and next function. Is there some JAVA scripting that can be used for this? We are currently using the following JAVA script to display the item image.

function FORM_OnAfterTransaction(data)
{
//was transaction successful?
if (formState.agsError)
return;
// build image URL and set the image control source
 if (lawForm.getFormValue("text3").length > 0)
 {  
 sItem = lawForm.getFormValue("text3");
 sPath = "http://rhqnlaw2.universalleaf.com/servlet/FileMgr?action=get&folder=/lawson/portal/content/images&name="
 var imgElem=lawForm.getFormElement("image1");
  if (imgElem)
  {
  imgElem.src = sPath;
  imgElem.style.visibility = "visible";
  }
 }
}