#verify_math{
    display:block;
    height:21px;    
}

#verify_math span{
    display:block;
    height:21px;    
    width:30px;
    position:relative;
    float:left;
    text-align:center;
}

#verify_math span.digital{
    background:url(./img/digi_img.jpg) left top no-repeat; 
}

#i_verify{
    position:relative;
    height:30px;    
    width:40px;
	font-size:16px;
	font-weight:bold;
	color:#1200FF;
    text-align:center;
}