When you try to publish or export your form using Web Form Builder, this alert may appear:

Here's a quote from Microsoft that helps explain this error:

"Because some scripts may take an excessive amount of time to run, Internet Explorer prompts the user to decide whether they would like to continue running the slow script. Some tests and benchmarks may use scripts that take a long time to run and may want to increase the amount of time before the message box appears. In Internet Explorer, the script time-out value can be changed on specific client machines by modifying a registry entry."

To correct this issue, please see the Microsoft Support article here: http://support.microsoft.com/kb/175500