.box{
	width:20px;
	height:30px;
	border:1px solid #DDDDDD;
	font-size:20px;
	float:left;
	white-space:nowrap;
	overflow:hidden;
	text-overflow;ellipsis;
	text-align:center;
}
.currentbox{
	border:3px solid red;
}
.underline{
border-bottom: 2px solid black;
}
.btn{
	width:55px;
	height:55px;
}
#otherbtndiv
{
	position:fixed;
	margin-top:30px;
	margin-left:0%;
}
#navigationbtndiv
{
	position:fixed;
	margin-top:30px;
	margin-left:85%;
}
#symbolbtndiv
{
	position:fixed;
	margin-top:85px;
	margin-left:85%;
}
#numberbtndiv
{
	position:fixed;
	margin-top:85px;
	margin-left:0%;
}
#letterbtndiv
{
	position:fixed;
	margin-top:85px;
	margin-left:0%;
	display:none;
}
#main
{
	margin-top:20px;
	width:70%;
}
.mathdiv
{
	width:502px;
	height:242px;
	border:1px solid #DDDDDD;
	font-size:20px;
}
.highlightquestion
{
	border: 1px solid gray;
}