在jQuery追加内部生成动态下拉菜单

I have dynamic table generated via jQuery using append. The first row contains table header. Second contains input fields (text fields, dropdown menu's etc). Third and others contains table content.

 $el.append('<tr>
                 <td>ID</td>
\
                 <td>Name</td>
\
                 <td>Something</td>
\
                 <td>Something</td>
\
                 <td>Something</td>
\
                 <td></td>
\
                 <td></td>
\
                 <td></td>
\
             </tr>
\
             <tr>
                 <td>
                     <input name="test-id" id="test-id" class="machine_management" maxlength="5"  type="hidden"/>
                 </td>
\
                 <td></td>
\
                 <td></td>
\
                 <td>HERE MENU</td>
\
                 <td></td>
\
                 <td></td>
\
                 <td></td>
\
                 <td></td>
\
             </tr>
\
'); 

and ajax({ // generate table content});

My problem is that i don't know how to create dynamic dropdown menu inside row 2( HERE MENU). Any ideas? I believe should be another ajax call inside? this append? Or create variable and add these values as a long string (variable = variable + value;) and then post in row 2? I hope my question is clear enough.

Your HERE MENU is going to need to be replaced with a <select> list. If you try to do it using nested AJAX calls, you are just looking for headaches - as you've guessed, you want to do a separate AJAX call, create the string in a variable, and insert it instead of your place-holder.