Create a job step that checks your time. Then give it an On Success / On Failure property. In EM, in the job properties, Edit the Step and click the Advanced tab. It should allow you to choose which Step of the job you want it to "skip" to based on Failure or Success.
Hope that helps.
Catadmin - MCDBA, MCSA
"The only stupid question is the one that *wasn't* asked.