I finally found out how to do this. Below is the code used to obtain this effect. I have using HR as the container for the style.
CSS as follows:
hr{
border: 0;
height: 2px;
margin:18px 0;
position:relative;
background: -moz-linear-gradient(left, rgba(0,0,0,0) 0%, rgba(0,0,0,0) 10%, rgba(0,0,0,0.65) 50%, rgba(0,0,0,0) 90%, rgba(0,0,0,0) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(0,0,0,0)), color-stop(10%,rgba(0,0,0,0)), color-stop(50%,rgba(0,0,0,0.65)), color-stop(90%,rgba(0,0,0,0)), color-stop(100%,rgba(0,0,0,0))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(left, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 10%,rgba(0,0,0,0.65) 50%,rgba(0,0,0,0) 90%,rgba(0,0,0,0) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(left, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 10%,rgba(0,0,0,0.65) 50%,rgba(0,0,0,0) 90%,rgba(0,0,0,0) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(left, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 10%,rgba(0,0,0,0.65) 50%,rgba(0,0,0,0) 90%,rgba(0,0,0,0) 100%); /* IE10+ */
background: linear-gradient(left, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 10%,rgba(0,0,0,0.65) 50%,rgba(0,0,0,0) 90%,rgba(0,0,0,0) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00000000', endColorstr='#00000000',GradientType=1 ); /* IE6-9 */
}
hr:before {
content: "";
display: block;
border-top: solid 1px #f9f9f9;
width: 100%;
height: 1px;
position: absolute;
top: 50%;
z-index: 1;
}
Enjoy
MC
