How to hide scroll bar and change width of select tag
===

i have two question : 

 i have a select tag  : how can i hide the scroll the other question is how can i increse the width of this select tag 
    
                     <select id="navSelection" size="5"  style="overflow-y :hidden">
                            <option value="temp">Temperature</option>
                            <option value="flow">Flow</option>
                            <option value="press">Pressure</option>
                            <option value="cond">Conductivity</option>
                        </select>

`style="overflow-y :hidden"` is not working 
[jsFiddle](http://jsfiddle.net/minagabriel/QZJAG/)
thanks in advance 
                        