How to realize the effect of right suspension frame by JS

This article mainly shows you "JS how to achieve the right suspension box effect", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "JS how to achieve the right side suspension box effect" this article.

The details are as follows

Keep a div suspended in the lower right corner all the time

Document # div1 {width: 100px; height: 150px; background: red; position: absolute; bottom: 0px; right: 0px } _ window.onscroll = function () {var oDiv = document.getElementById ('div1'); var scrollTop = document.documentElement.scrollTop | document.body.scrollTop;// browser is compatible with startmove (document.documentElement.clientHeight-oDiv.offsetHeight + scrollTop) / / document.documentElement.clientHeight page visual area height} var timer = null / / suspension frame buffer movement function startmove (iTarget) {var oDiv = document.getElementById ('div1'); clearInterval (timer); timer = setInterval (function () {var speed = (iTarget-oDiv.offsetTop) / 4 Speed = speed > 0?Math.ceil (speed): Math.floor (speed); if (oDiv.offsetTop = = iTarget) {clearInterval (timer);} else {oDiv.style.top = oDiv.offsetTop + speed+'px' }, 30)} couplet suspension

Let div float in the middle of the right.

You just need to change the data in the start move () function

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