snowathlete

Hi everyone, I run a genealogy website that is mainly html, a few php pages, and a few java scripts i picked up for specific needs. I dont know php or java. though i would like to pick a few things up. I have a problem, a lengthy task manually, that i would like to automate. I have about 300 images in a directory: images/arms/ and each image file name begins with a number followed by an underscore: e.g. 45_coatsofarms.png I have a html file with text and in that text each image is mentioned with the number followed by a period: e.g. 45. What i need to achieve is an image link directly after this text pointing to the correct file. I know this can be done in php, but im not sure how to achieve it. Can someone offer some help? Thanks