less css background gradient

gistfile1

.bgrad (@start, @end) {
    background-color: @start;
    background-image:      -o-linear-gradient(top, @start, @end);
    background-image:     -ms-linear-gradient(top, @start, @end);
    background-image:    -moz-linear-gradient(top, @start, @end);
    background-image: -webkit-linear-gradient(top, @start, @end);
    background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(@start), to(@end));
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='@start', endColorstr='@end');
}