replace content via jquery

I'm new to jquery and have a simple question for you. How to replace ".5" with ":30" in the below shown html "div" by using jquery?

    <div class="timepicker">
    <select>
    <option value="0" selected="selected">00</option>
    <option value="0.5">00.5</option><option value="1">01</option>
    <option value="1.5">01.5</option><opti开发者_运维知识库on value="2">02</option>
    </select>
    </div>

Thanks in advance.

You could do (this works for the html, do you need the valuies too?):

$('option:contains(".5")').each(function(){
     $(this).html($(this).html().replace('.5', ':30'));

});

if you also need to replace the values:

$('option:contains(".5")').each(function(){
     $(this).html($(this).html().replace('.5', ':30'));
     $(this).val($(this).val().replace('.5', ':30'));              
});

fiddle here: http://jsfiddle.net/nicolapeluchetti/dwWXs/

$('option[value="0.5"]').attr("value",".30");
$('option[value="0.5"]').html(".30");