Is standing the guitar up bad for the neck? Should I put ym electric on the stand and acoustic on the floor?
One Love

“One good thing about music, when it hits- you feel no pain” -Bob Marley
It's fine. Get a stand for both though, the floor is a bad place for instruments.
My guitars have stood up since I got them. No problems yet. Hell...even the intonation is perfect on both. Standing them up won't cause harm. I recommend a stand for when you're taking a break from playing and a hardcase for when you're not playing.
My Gear:

Washburn WI14 Electric
Washburn D10s Acoustic
Marshall MG100HDFXR Special Edition
Marshall MG412AR Special Edition

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^Xenn is my favorite MG owner EVAR.

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