Is it legal for my employer to harass me or tell my co-workers if I take time off to deal with domestic or sexual violence?
No. Your employer cannot fire you, harass you, or punish you in any way just because you ask for and/or take this time off to deal with domestic/sexual violence issues or because you are a victim.*
Also, the law requires your employer to keep your domestic violence or sexual violence situation private (confidential). For example, your employer cannot tell your co-workers, your clients, or other employers that you took time off to deal with domestic violence or sexual assault. Your employer also cannot disclose (talk about or write about) the reason for your time off. They must also keep private any documents that you give them that relate to your domestic violence or sexual assault situation.**
* 820 ILCS § 180/30
** 820 ILCS § 180/20(d)