How can I display the popup below using the onclick method in JavaScript with a button?

 <div data-role=popup id=myPopupDialog4>

    <a href=# data-rel=back class=ui-btn ui-corner-all ui-shadow ui-btn ui-icon-delete ui-btn-icon-notext ui-btn-right>Close</a>



    <div data-role=header>

       <h4>Post Update </h4>

    </div>



    <div data-role=main class=ui-content>

             <pre><B>

             <div id=resultDayOfWeek></div>

             <div id=resultNum></div>

             <div id=resultDir></div>

             <div id=resultStop></div>

             <div id=resultTime></div>     

             </B> 

             </pre>

    <fieldset data-role=controlgroup>

        <legend>Choose Status</legend>



       <label for=Arrived/Left>Arrived/Left</label>

       <input type=radio name=status id=Arrived/Left value=Arrived/Left>

       <label for=Delayed>Delayed</label>

       <input type=radio name=status id=Delayed value=Delayed>  

       <label for=Canceled>Canceled</label>

       <input type=radio name=status id=Canceled value=Canceled>

       <label for=getupdate>getupdate from others</label>

       <input type=radio name=status id=getupdate value=getupdate>

       <label for=Other>Other</label>

       <input type=radio name=status id=Other value=Other>

       </fieldset>



       <textarea name=addinfo id=info> Comments goes here.... </textarea>

       <input type=submit  value=Submit onclick=postSubmit();>  

       <div id=poststatus></div>   

    </div>  



    <div data-role=footer >

       <h1>Footer Text</h1>

    </div>



 </div>