Playit

CSS Property:
bottom:
auto
10px
25px
50px
100px
-10px
-25px
-50px
-100px
Result:
Play with different bottom values for this yellow DIV element.

Note: To "bottom" positioning elements using % (percent) values, use position:absolute.

CSS Code:
div#myBox
{
background-color:yellow;
width:100px;
position:relative;
bottom:0px;
}
Click the property values above to see the result
W3Schools.com - Play it