JQuery made it really simple working with HTML select control. Consider you have following select control and you want to do various operations as listed thereafter. <select id="selectCtrl" multiple="multiple"> <option value="bb">Black Berry</option> </select> The attribute multiple=“multiple” will make this select as multi select. 1. How to add a new option to a HTML select control $('#selectCtrl').append('<option value="ga">Green Apple</option>'); $('#selectCtrl').append('<option value="ym">Yellow Mango</option>'); 2. How to get all the selected option ids from a HTML select control var selectedIds = $('#selectCtrl').