/* additional style */
.black {
    color: black;
}

.gray {
    color: gray;
}

.grey {
    color: gray;
}

.silver {
    color: silver;
}

.white {
    color: white;
}

.maroon {
    color: maroon;
}

.red {
    color: red;
}

.magenta {
    color: magenta;
}

.fuchsia {
    color: fuchsia;
}

.pink {
    color: pink;
}

.orange {
    color: orange;
}

.yellow {
    color: yellow;
}

.lime {
    color: lime;
}

.green {
    color: green;
}

.olive {
    color: olive;
}

.teal {
    color: teal;
}

.cyan {
    color: cyan;
}

.aqua {
    color: aqua;
}

.blue {
    color: blue;
}

.navy {
    color: navy;
}

.purple {
    color: purple;
}

.under {
    text-decoration: underline;
}

.over {
    text-decoration: overline;
}

.blink {
    text-decoration: blink;
}

.line {
    text-decoration: line-through;
}

.strike {
    text-decoration: line-through;
}

.it {
    font-style: italic;
}

.ob {
    font-style: oblique;
}

.small {
    font-size: small;
}

.large {
    font-size: large;
}

/* sort table library */
table.sortable th:not(.sorttable_sorted):not(.sorttable_sorted_reverse):not(.sorttable_nosort):after {
    content: " \25B4\25BE"
}
table.sortable tbody tr:nth-child(2n) td {
  background: #ffffff;
}
table.sortable tbody tr:nth-child(2n+1) td {
  background: #f2f2f2;
}