#u424
{
	background-color: transparent;
}

#u249
{
	background: transparent url("../images/main%20page-main%20page.png") no-repeat left top;
	background-size: contain;
}

#u249:hover
{
	background: transparent url("../images/main%20page-highlighted.png") no-repeat left top;
	background-size: contain;
}

#u249:active
{
	background: transparent url("../images/main%20page-clicked.png") no-repeat left top;
	background-size: contain;
}

#u285
{
	background: transparent url("../images/home-normal.png") no-repeat left top;
	background-size: contain;
}

#u285:hover
{
	background: transparent url("../images/home-highlighted.png") no-repeat left top;
	background-size: contain;
}

#u285:active
{
	background: transparent url("../images/home-clicked.png") no-repeat left top;
	background-size: contain;
}

#u633
{
	background: transparent url("../images/leading%20question-normal.png") no-repeat left top;
	background-size: contain;
}

#u633:hover
{
	background: transparent url("../images/leading%20question-rollover.png") no-repeat left top;
	background-size: contain;
}

#u633:active
{
	background: transparent url("../images/leading%20question-clicked.png") no-repeat left top;
	background-size: contain;
}

#u693
{
	background: transparent url("../images/mechanism-normal.png") no-repeat left top;
	background-size: contain;
}

#u693:hover
{
	background: transparent url("../images/mechanism-rollover.png") no-repeat left top;
	background-size: contain;
}

#u693:active
{
	background: transparent url("../images/mechanism-clicked.png") no-repeat left top;
	background-size: contain;
}

#u724
{
	background: transparent url("../images/h-nmr-normal.png") no-repeat left top;
	background-size: contain;
}

#u724:hover
{
	background: transparent url("../images/h-nmr-rollover.png") no-repeat left top;
	background-size: contain;
}

#u724:active
{
	background: transparent url("../images/h-nmr-clicked.png") no-repeat left top;
	background-size: contain;
}

#u753
{
	background: transparent url("../images/references-normal.png") no-repeat left top;
	background-size: contain;
}

#u753:hover
{
	background: transparent url("../images/references-rollover.png") no-repeat left top;
	background-size: contain;
}

#u753:active
{
	background: transparent url("../images/references-clicked.png") no-repeat left top;
	background-size: contain;
}

#u784
{
	background: transparent url("../images/about%20us-normal.png") no-repeat left top;
	background-size: contain;
}

#u784:hover
{
	background: transparent url("../images/about%20us-rollover.png") no-repeat left top;
	background-size: contain;
}

#u784:active
{
	background: transparent url("../images/about%20us-clicked.png") no-repeat left top;
	background-size: contain;
}

#u819
{
	background: transparent url("../images/experimental-normal.png") no-repeat left top;
	background-size: contain;
}

#u819:hover
{
	background: transparent url("../images/experimental-rollover.png") no-repeat left top;
	background-size: contain;
}

#u819:active
{
	background: transparent url("../images/experimental-clicked.png") no-repeat left top;
	background-size: contain;
}

#u627,#u878
{
	border-width: 0px;
	border-color: transparent;
	background-color: transparent;
}