Resize all object of a div

it is possible to resize all object of div ( example img , text ... ) with one command only when te all object download
I'use for img this code

$(document).ready(function (){
$(img).each(function(i) {
var rap=($(window).height()/600);
if (($(window).height()<=600)) {rap=1}
if (($(this).width()>0)&& ($(this).height()>0)) {
var w = $(this).width()*rap
var h = $(this).height()+rap
$(this).css({ height: h, width: w });
}

but is image of div not download this image no view