function isnumeric(currentEvent)
{
    var character
    if(currentEvent.keyCode)
    {
        character = currentEvent.keyCode;
    }
    else
    {
        character = currentEvent.which
    }
    if(character && character != 8 && character != 9 && character != 46 && (character < 48 || character > 57))
    {
        return false;
    }
    return true;
}