var myObjectElement = document.createElement('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="https://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="800" height="500" id="intro" align="middle">');
var myParamElement1 = document.createElement('<param name="allowScriptAccess" value="sameDomain" />');
var myParamElement2 = document.createElement('<param name="movie" value="/img/flash/intro.swf" />');
var myParamElement3 = document.createElement('<param name="quality" value="high" />');
var myParamElement4 = document.createElement('<param name="bgcolor" value="#ffffff" />');

myObjectElement.appendChild(myParamElement1);
myObjectElement.appendChild(myParamElement2);
myObjectElement.appendChild(myParamElement3);
myObjectElement.appendChild(myParamElement4);

IntroFlash.appendChild(myObjectElement);