How to force IE11 that it renders as IE 8, javascript

Hi everybody,

I try to render a html page as IE8 , but I am using IE11.

I try it like this:

[code]
var html = document.getElementsByTagName("html")[0];
if (isIE){ 
   html.className = html.className || ""; 
   if (docModeIE == 5) html.className += " ie5"; 
   if (docModeIE == 6) html.className += " ie6"; 
   if (docModeIE == 7) html.className += " ie7"; 
   if (docModeIE == 8) html.className += " ie8"; 
};
[/code]

and then for the HTML page:

[html]
[/html]


but that doesnt work.

Thank you