Levene's test is widely considered to be the standard homogeneity of variance test. Use the GLM procedure and specify the HOVTEST option in the MEANS statement. In this example we
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The Test of Homogeneity of Variances table provides Levine’s test for testing the null hypothesis that the withingroup variances are constant across groups. When p＞
http://hi.baidu.com/r0yal/blog/item/fc0b683e77a4a2...

Don't know about Fligner, but Levene's test is actually an ANOVA of absolute deviations from group means (or group medians, this would be BrownForsythe test). ANOVA is called "
http://stats.stackexchange.com/questions/18137/wha...
