Is Widows tab-order == HTML Z-order?

If I use a Windows program to generate HTML forms, can I say that Windows tab-order == HTML Z-o开发者_运维问答rder?

No. The TAB order is the order in which controls receive focus when you use the TAB key. The Z order (or Z index) is a 3D type index which dictates which UI elements will appear above (over) others.