maximum execution time error

Is there a way to, on a script by script basis, change the maximum allowed time that a script is allowed to run? I have a web admin tool that I'm creating which will allow people to do some mysql database administration. The tool creates a big sql statement before it executes it. I'm getting the following error... "Fatal error: Maximum execution time of 30 seconds exceeded in /Library/WebServer/Documents/sandbox/make_test_data/database_admin line 29" Is there a parameter that I can set on a script by script basis? -- -James