it should be able to do but will take a while and will be complicated

1. build a script to get the last modified date of a table and return it in the source
2. get a javascript function to call the script and place the value in a javascript variable
3. then build a javascript function to recall the above function and compare the newscript value to the variable.
4. if the values match do nothing, if they dont match go else where

there are javascript functions about that can collect data from another page without the need to refresh the page im just not sure if you could do it with that your trying to do

it would be alot easier if you place the values in a phpsession and refresh the page every so often