input[type="number"].numberOnly::-webkit-inner-spin-button, 
input[type="number"].numberOnly::-webkit-outer-spin-button { 
    -webkit-appearance: none;
    -moz-appearance: none;    
    appearance: none;   
    margin: 0; 
}

input[type="number"].numberOnly {
    -moz-appearance:textfield;
}