html - Inline input fields behave differently in browsers -

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i have quantity selector on webpage. used trick make them inline without gaps.

<div id="quantitybar">                             <span class="inputwrapper">         <button id="piece_plus">+</button>         <input type="text" value="1" id="pieces" />         <button id="piece_minus">-</button>     </span>     <input type="submit" value="add cart" />                         </div>

here's fiddle: http://jsfiddle.net/86sz7/

it looks nice in chrome, in firefox bottom border of text imput field missing piece. if set overflow: hidden span looks ok, submit button shifted down. want make same in chrome , firefox. plus: nice have submit button align other inputs too, because it's little off.


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