.button {
   border-top: 1px solid #000000;
   background: #40454a;
   background: -webkit-gradient(linear, left top, left bottom, from(#ababab), to(#40454a));
   background: -webkit-linear-gradient(top, #ababab, #40454a);
   background: -moz-linear-gradient(top, #ababab, #40454a);
   background: -ms-linear-gradient(top, #ababab, #40454a);
   background: -o-linear-gradient(top, #ababab, #40454a);
   padding: 15px 30px;
   -webkit-border-radius: 2px;
   -moz-border-radius: 2px;
   border-radius: 2px;
   -webkit-box-shadow: rgba(0,0,0,1) 0 1px 0;
   -moz-box-shadow: rgba(0,0,0,1) 0 1px 0;
   box-shadow: rgba(0,0,0,1) 0 1px 0;
   text-shadow: rgba(0,0,0,.4) 0 1px 0;
   color: #ffffff;
   font-size: 17px;
   font-family: Helvetica, Arial, Sans-Serif;
   text-decoration: none;
   vertical-align: middle;
   }
.button:hover {
   border-top-color: #3a3b3b;
   background: #3a3b3b;
   color: #a19ca1;
   }
.button:active {
   border-top-color: #303030;
   background: #303030;
   }

#inicial {
	position: absolute;
	width:300;
	height:80;
	display: block;
	margin-left: 	880px;
	margin-top: 	200px;
}

#final {
	position: absolute;
	width:300;
	height:80;
	display: block;
	margin-left: 	880px;
	margin-top: 	300px;
}


#qnt {
	position: absolute;
	width:300;
	height:80;
	display: block;
	margin-left: 	880px;
	margin-top: 	400px;
}

#interpolar {
	position: absolute;
	margin-left: 1050px;
	margin-top: 520px;
}