Hello,
I a few very basic questions about CSS. I'd really appreciate it if you could answer them.

1) What is the difference between css codes starting with # and with .
2) What is the difference between using id="xx" and class="xx"
3) What is the difference between writing it like
Code:
.help {  background-color : #fffff0;}
and
Code:
.help {
background-color: #fffff0;
}
4) Should it be
Code:
.thtcolor { COLOR: #EEEEFF;}
or
Code:
.thtcolor { COLOR: #EEEEFF}
Thanks