How to insert a textbox into a div that is being created from a loop

I am using a javascript jquery plugin that creates a select box and an input box. I have it inside a for loop which replicates the select and input box for the amount of times it iterates. What I am trying to do is while it is in the loop for each time the select and input box get created it gets thrown inside a div with a unique id of course.

Below is my explanation and where I am currently at appreciate any help.

What I have tried:

for(i=0; i<Qty; i++)
{
   var newDiv = document.createElement('div'); //created the div for each iteration
   newDiv.id = 'd'+ i; //created a div id for each iteration 
   newDiv.className = 'myClass'; //created a class
   form.render();//this function creates the select box and input box
   /*I am stuck here not exactly sure how I am suppose to take the form.render()
        and place it into the created div.*/

}

Tags: Javascript, jQuery