I'm trying to select all the elements who's name value contains the string "visitors" using Javascript. I cannot add a class in this case.
<select name="visitors10">
<option class="disableDuration4" value="5">5</option>
<option class="disableDuration5" value="6">6</option>
<option class="disableDuration6" value="7">7</option>
</select>
<select name="visitors11">
<option class="disableDuration4" value="5">5</option>
<option class="disableDuration5" value="6">6</option>
<option class="disableDuration6" value="7">7</option>
</select>
<select name="visitors12">
<option class="disableDuration4" value="5">5</option>
<option class="disableDuration5" value="6">6</option>
<option class="disableDuration6" value="7">7</option>
</select>