Make the web page frame transparent and bottom-aligned code_Experience exchange

Make the web page frame transparent
Browsers above IE5.5 and NN6 support the allowTransparency method of the Frame and Iframe objects. If the background color of an object is set to Transparency, it will inherit the characteristics of the container containing it. We can use this feature to turn on/off the transparent background.
The code is as follows:
a.html is as follows:

Transparent document

This IFRAME has no background color

BODY