JSFiddle - React, Tailwind, and code Playground

HTML

<input type='button' onclick='changeText3()' value='click to change'/>

<div id="divtabone"><div id="1" style="margin-left: 0px; padding: 0px; float: left; width: 640px; height: 392px; border: 0px;"><object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="640" height="360" id="utv786564"><param name="flashvars" value="autoplay=false&amp;brand=embed&amp;cid=3064708"/><param name="allowfullscreen" value="true"/><param name="allowscriptaccess" value="always"/><param name="movie" value="http://www.ustream.tv/flash/viewer.swf"/><embed flashvars="autoplay=false&amp;brand=embed&amp;cid=3064708" width="640" height="360" allowfullscreen="true" allowscriptaccess="always" id="utv786564" name="utv_n_665786" src="http://www.ustream.tv/flash/viewer.swf" type="application/x-shockwave-flash" /></object></div> <div id="2" style="margin-left: 0px; padding: 0px; float: left; width: 320px; height: 392px; border: 0px;"><iframe style="border: 0 none transparent;" src="//www.ustream.tv/socialstream/3064708" width="320" height="392" frameborder="no"></iframe></div></div>

JavaScript

var newHTML = '<div id="1" style="margin-left: 0px; padding: 0px; float: left; width: 640px; height: 392px; border: 0px;"><iframe width="640" height="392" src="http://www.ustream.tv/embed/3064708?v=3&amp;wmode=direct" scrolling="no" frameborder="0" style="border: 0px none transparent;"></iframe></div><div id="2" style="margin-left: 0px; padding: 0px; float: left; width: 320px; height: 392px; border: 0px;"><iframe style="border: 0 none transparent;" src="//www.ustream.tv/socialstream/3064708" width="320" height="392" frameborder="no"></iframe></div>';
var oldHTML = document.getElementById('divtabone').innerHTML;

function changeText3(){  
    var currentHTML = document.getElementById('divtabone').innerHTML;
if (currentHTML!=newHTML) 
       {
     document.getElementById('divtabone').innerHTML = newHTML;
}
else
  {
document.getElementById('divtabone').innerHTML = oldHTML;
}
}