unable to select an item from select box using select name.

unable to select an item from select box using select name.

I am using following code to select an item from select box dynamically.But its not working. Can anybody help me on this.I know we can use id here, but i need with name.

   $("select[name='temp_name'] option:eq('bb')").attr("
selected","selected");


 select box is like this.

   <select name='temp_name'>
    <option value='bb'>bb</option>
    <option value='cc'>cc</option>
   </select>