html - bootstrap-select data-style does not work -

i trying style selectbox (http://silviomoreto.github.io/bootstrap-select/) with

data-style="btn-info" 

but has no effect. whole code:

<select class="selectpicker" data-width="25%" data-style="btn-info">    <option>1</option>    <option>2</option>    <option>3</option>    <option>4</option>    <option>5</option>    <option>6</option>    <option>7</option>    <option>8</option>    <option>9</option>    <option>10</option> </select> 

the data-width dows not work. has idea? here testsite: http://testshop.mein-sporttagebuch.de/produkte/details/0001. find relevant selectbox on right side. in advance!

the 'http://testshop.mein-sporttagebuch.de/application/javascript/main.js' setting options when select instantiated override data attributes set on elements..

/* select box */ $('.selectpicker').selectpicker({     style: 'btn-primary'     ,size: "auto"     ,width: "150px" }); 

change to..

/* select box */ $('.selectpicker').selectpicker({  });