function RCV_updateAmounts()
{
    var p = document.getElementById("peoplecount").value;
    
    if ( p != null && p != "" && p != 0 )
    {
        var ias = document.getElementsByName("ingredient_amount");
        var ia;
        var id;
        
        for ( var i = 0 ; i < ias.length ; i++ )
        {
            ia = ias[i];
            var id = ia.id.split('_')[1];
            document.getElementById('ingredientAmountOut_'+id).innerHTML = (ia.value * p/10);
        }
    }
}