html - I want to change the select icon/dropdown icon to (fa-chevron-down). How can I? -

i want use form in code bootstrap want change select icon/dropdown icon fa-chevron-down.

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap-theme.min.css" rel="stylesheet"/>  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css" rel="stylesheet"/>    <div class="container">    <div class="row">      <div class="col-sm-6">        <h2>heading</h2>        <div class="form-group">          <label for="exampleinputemail1">some-text</label>          <select class="form-control input-lg">...</select>          <label for="exampleinputemail1">some-text</label>          <select class="form-control input-lg">...</select>          <label for="exampleinputemail1">some-text</label>          <select class="form-control input-lg">...</select>        </div>      </div>    </div>  </div>

here's solution uses font-awesome's fa-chevron-down natively (without using image). require add font-awesome tag markup, it's clean.

/* remove original arrow */  select.input-lg {    -webkit-appearance: none;    -moz-appearance: none;    -o-appearance: none;    /* no standardized syntax available, no ie-friendly solution available */  }    select + i.fa {    float: right;    margin-top: -30px;    margin-right: 5px;    /* when click on chevron, click goes on dropdown menu */    pointer-events: none;    /* after cover original arrow */    /* (for browsers don't support syntax used above) */    background-color: #fff;    padding-right: 5px;  }

<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css" rel="stylesheet"/>  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap-theme.min.css" rel="stylesheet"/>  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css" rel="stylesheet"/>    <div class="container">    <div class="row">      <div class="col-sm-6">        <h2>heading</h2>        <div class="form-group">          <label for="exampleinputemail1">some-text</label>          <select class="form-control input-lg">...</select>          <i class="fa fa-chevron-down"></i>          <label for="exampleinputemail1">some-text</label>          <select class="form-control input-lg">...</select>          <i class="fa fa-chevron-down"></i>          <label for="exampleinputemail1">some-text</label>          <select class="form-control input-lg">...</select>          <i class="fa fa-chevron-down"></i>        </div>      </div>    </div>  </div>