CSS special values *,\0/

Question

I see a css code with *, \0/ I just wonder what does it means? I guess they related to some specific browser?

.form_element select
{
   padding:4px;
   *padding:0px;
   padding:0px \0/;
}

Answer 1

\0/ targets IE8 and below, and appears after the value:

#id
{ padding: 0px \0/; }

* targets IE7 and below, and appears directly before the property

#id
{ *padding: 0px; }

_ targets IE6 and below, and appears directly before the property

#id
{ _padding: 0px; }