Checking and unchecking radio buttons with Jquery Mobile

[enusalgu]

I can't check a set of checkboxes programatically with jquery mobile, I have the following code:\[code\]<div data-role="fieldcontain" id="div_radio" class="radiogroup"> <fieldset data-role="controlgroup"> <input type="radio" name="radio-pieces" id="radio-choice-1" value="http://stackoverflow.com/questions/14409571/3" checked="checked" /> <label for="radio-choice-1">1 to 3</label> <input type="radio" name="radio-pieces" id="radio-choice-2" value="http://stackoverflow.com/questions/14409571/5" /> <label for="radio-choice-2">4 to 5</label> <input type="radio" name="radio-pieces" id="radio-choice-3" value="http://stackoverflow.com/questions/14409571/6" /> <label for="radio-choice-3">over 5</label> </fieldset></div>\[/code\]If I do: \[code\]$("input[type='radio']:last").attr("checked",true).checkboxradio("refresh");\[/code\] everything works perfect, but none of this work at all:\[code\]$("input[type='radio']:first").attr("checked",true).checkboxradio("refresh");$("input[type='radio']:eq(0)").attr("checked",true).checkboxradio("refresh");$("input[type='radio']:eq(1)").attr("checked",true).checkboxradio("refresh");$("input[type='radio']:eq(2)").attr("checked",true).checkboxradio("refresh");\[/code\]How can I properly manipulate these elements? Unselecting all checkboxes also works fine:\[code\]$("input[type='radio']").attr("checked",false).checkboxradio("refresh");\[/code\]