CSS clears the drop-down arrow style for Select

Select {  /*chrome and Firefox inside the border is not the same, so a copy of the */  border:solid 1px #000;  /* Key: Clear the Default Select selection box style */  appearance:none;  -moz-appearance:none;  -webkit-appearance:none;  /* Displays the small arrow picture in the middle right of the selection box *  /Background:url ("Http://ourjs.github.io/static/2015/arrow.png") no-repeat scroll Center Transparent;  /* Set aside a little position for the drop-down arrows to avoid being covered by text */  padding-right:14px;} /* Clear the Default selection box style of IE to clear, hide the drop-down arrow */select::-ms-expand {display:none;}

CSS clears the drop-down arrow style for Select