[id10t]

#!/bin/bash
for i in `ls -1 *jpg`
do
  echo \< img src=\"$i\"\>  >> htmlfile.htm
done

You could even pass it an arg, so you control what HTML file gets created

#!/bin/bash

for i in `ls -1 *jpg`
do
  echo \< img src=\"$i\"\>  >>$1
done