Judging the scroll bars in HTML

In the work you need to adjust the column width of the jqgrid, but do not want to have a horizontal scroll bar, because it is a fixed column width, when the display area is reduced, the data will appear vertical scroll bar

At this point, you need to determine whether the vertical scroll bar has a column width adjustment.

Self-investigation, found that the scroll bar can adjust the specified position, but JS does not support the determination of the scroll bar, the final two solutions.

1. Adjust the scroll bar position, then go to the position, if zero, then there is no scroll bar.

2. The height of the displayed page is different from the height of the data display element, so you can tell if the scroll bar exists.

Judging the scroll bars in HTML