مساعده فى الموضوع ده

.montadamido-offlinebutton {
background-color:transparent;
background-image:url("http://i41.servimg.com/u/f41/12/51/44/77/th/user_o10.gif");
background-position:center center;
background-repeat:no-repeat;
border:medium none;
height:20px;
min-height:20px;
min-width:70px;
width:70px;
}