SCSS (Sass): IE6 対応 height (mixin)

scss:

@mixin minHeight($arg) {
    min-height: $arg; /* IE7 <= */
    height: auto !important; /* IE7 <= */
    _height: $arg; /* IE6 */
}
.class {
    @include minHeight(300px);
}

css:

.class {
    min-height: 300px;
    height: auto !important;
    _height: 300px;
}