Bootstrapのボタン
button
class=btn btn-mini
class=btn btn-small
class=btn
class=btn btn-large
class=btn btn-block
class=btn
class=btn btn-primary
class=btn btn-info
class=btn btn-success
class=btn btn-warning
class=btn btn-danger
class=btn btn-inverse
class=btn btn-link
class=btn disabled