how to remove border on button click

outline:none;

<style>
input[type="button"]
{
    width:120px;
    height:60px;
    margin-left:35px;
    display:block;
    background-color:gray;
    color:white;
    border: none;
    outline:none;
}
</style>

.btnName{
	outline: none;
}

.x-btn:focus, .button:focus, [type="submit"]:focus {
   outline: none;
}