Update WAR file to work on FireFox Chrome and Safari - repost

We currently have a java WAR file that was built specifically for us around 2006-2007. The WAR file was built in Lomboz Eclipse. The system currently runs using an Oracle XE 10.2g database backend and WAR file on Tomcat. At the time it was built to run on IE7. The system is used for Quoting, Invoicing, Purchase Orders, Delivery and Credit notes. We are now using OSX as well as Windows and need to update the WAR file so that it works on FireFox, Chrome and Safari. Currently the system partly works on FF,Chr & Saf and while we can load information into the screen we cannot edit the information as the majority of the buttons do not work correctly. I have looked at some of the files and the java has been coded to use parent and child nodes to access the button links. This seems to be causing the problems with FF,Chr & Saf. The two attached images show the Client Order Search screen. If you look along the bottom of the image there are some buttons. You will spot the difference on the second button 'Edit Order' on image one. When this button is clicked it should show two buttons 'Customer' & 'Products'. These two options do not appear in FireFox, Chrome or Safari. We would like someone to recode all the button links so that they will function correctly in FF,Chr & Saf. If the above code correction is achieved there are more alterations that we would like to be made to the system. ie. Duplicate Quote button, Add Manual Line to Quote and so on. Please contact me for more details or to discuss the project further. I have added two java files before they are compiled into the WAR file and the screenshot below. There are approx 20 pages that need adjusting. Some of the buttons on each page are identical and some are specific to each page. Regards, Rob.