about css class

Question

hi to all

i want to know that i have a css and now i don't want to use a single property of class like:

body

{

   background:transparent url('some url of an image') no-repeat;

   width:100px;

   height:100px;

   color:#dadada;

   font-family:verdana;  

}

i had define width ,height and backcolor

i want to use width and height and don't want to use backcolor from css.