Javascript：如何识别“div”是否溢出？

Question

I have a div with overflow: auto (a vertical scroll bar appears if the div contains a lot info).

How could I identify at some point if the vertical scroll bar appears or not ?

Answer 1

From http://bytes.com/topic/javascript/answers/157924-detect-if-scrollbars-visible-inside-div :

if (document.getElementById('divID').scrollHeight > document.getElementById('divID').clientHeight)
{
//a vertical scroll bar is present
}
else
{
//a vertical scroll bar is NOT present
}

Answer 2

这里已经回答了