add scrollbar to popup window in IE after opening window

i want to add scrollbar to popup window after opening it. In FireFox there is a property 'window.scrollbars', but IE doesn't have such property, how can i add scrollbar in IE 开发者_开发百科using javascript? Thanks.

Use css overflow:scroll; property.

To access it by JavaScript, use:

document.body.style.overflow = 'scroll';