Check to see if an iframe has scrollbars visible?

Question

I was wondering if anyone knows how to check to see if the content in an iframe is overflowing and the scrollbars are visible?

Thanks

Answer 1

in general you should compare the delta of the element's scrollHeight/scrollWidth and offsetHeight/offsetWidth. if positive then 'we got a winner'. but.. when looking for scrollbars in an iframe, things get a little bit trickier:

var frm=document.getElementById("frm");
var iIsVrScrollBar =  frm.contentWindow.document.documentElement.scrollHeight>frm.contentWindow.document.documentElement.offsetHeight ? 1 : 0;
var iIsHrScrollBar = frm.contentWindow.document.documentElement.scrollWidth>frm.contentWindow.document.documentElement.offsetWidth ? 1 : 0;