Find an element inside a div using javascript

You want to find it based on what? Here's a solution if you want to find it based on id:

function (containerID, childID) {
   var elm = document.getElementById(childID);
   var parent = elm ? elm.parentNode : {};
   return (parent.id && parent.id === containerID) ? elm : {};
}

Should how data two it file to creates table ti yes

Placeholders  are the containers in  layouts  that hold such content as  text  (including body  text, bulleted lists, and titles),  tables,  charts, smartart graphics, movies, sounds, pictures, and clip art.  slide layouts  also contain the theme (colors, fonts, effects, and the background) of a  slide.