JS to achieve simple right and left side of the fixed advertising effect example _javascript skills

The example of this article tells JS to achieve a simple fixed advertising effect on both sides of the method. Share to everyone for your reference. The specific analysis is as follows:

Most sites have the right and left side of the fixed advertising bit, the following is the most simple to achieve this effect of the code, may be in the Internet Explorer scrolling when there will be a little jitter, the problem later resolved, and first realized.

Point one:

var adtop = adleft.offsettop;

Gets the position of the element from the top, which needs to be used when scrolling.

Point two:

Copy Code code as follows:

adleft.style.top=adtop+ (Document.documentElement.scrollTop | | document.body.scrollTop) + "px";

When scrolling, assigns the top position of the element to the distance from the top of the element itself plus the distance to scroll.

Code on:

<! DOCTYPE html>  

The

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