CSS/HTML5 equivilent to iframe marginheight and marginwidth

Actually this is a valid question. Unfortunately it turns out that the marginheight, marginwidth and frameborder are properties of the iframe element itself, not the element's style property see http://www.w3schools.com/jsref/prop_frame_marginheight.asp

So, for example, you can do this in JavaScript:-

document.getElementById("SomeIframe").marginheight = "0";

but you CANNOT do this

document.getElementById("SomeIframe").style.marginheight = "0";

and setting the margin has NO EFFECT (i.e. you will still get the default margin in the iframe element):-

document.getElementById("SomeIframe").style.margin = "0";

So the answer to cbright6062's question is that there is no way to set the marginheight, marginwidth and frameborder properties of an iframe in a style sheet.