The web page works normally under IE8, but the layout is messed up under IE7. How to find the reason_html/css_WEB-ITnose

The web page is normal under ie8 but the layout is confusing under ie7. How to find the reason
ie7

ie8

Use external css

Reply to the discussion (solution)

The css is not compatible. If you don’t post the test code, who can spot the problem? . .

For something like this, you can make a small test code

I found the reason. It is a problem with the added js date selection code