下拉列表的兼容 css3

 #search-car-dealer{

     appearance:none;

     -moz-appearance:none;

     -webkit-appearance:none;

     background: url("http://ourjs.github.io/static/2015/arrow.png") no-repeat scroll right center transparent;

    }

  #search-car-dealer::-ms-expand { display: none;}