Add and Remove DOM Elements..

Snippets for adding DOM elements dynamically to the defined DOM element.
Here, "mydiv2" is added dynamically as "mydiv"1's child.

    //Dynamically generate Div
    var newdiv = document.createElement('div');
    var divIdName ='mydiv2';
    newdiv.setAttribute('id',divIdName);
    newdiv.style.width = "565px";
    newdiv.style.height = "480px";
    newdiv.style.left = "0px";
    newdiv.style.top = "0px";
    newdiv.style.position = "absolute";
   newdiv.style.border = "1px solid #000";
    document.getElementById('mydiv1').appendChild(newdiv);

A good example by Dustin Diaz to remove DOM elements Dynamically.

removeElement JavaScript Function

function removeElement(divNum) {

  var d = document.getElementById('myDiv');

  var olddiv = document.getElementById(divNum);

  d.removeChild(olddiv);

}