Custom styled select elements in IE10

For custom styling of select elements, use -ms-expand in IE10 to get the same effect as -webkit-appearance: none.

select {
    -webkit-appearance: none;
    -moz-appearance: none;
}

select::-ms-expand {
    display: none;
}

http://msdn.microsoft.com/en-us/library/windows/apps/hh465742.aspx