JS Function Code collection _ javascript tips-js tutorial

This article mainly introduces relevant information about JS Function Code collections. For more information, see 1. Simulate fade in () and fade out ().

Principle: setInterval ("opacity ++ transparency" function, time interval)

var alpha = 0;function play(){timer = setInterval(function(){alpha += 2;alpha > 100 && (alpha = 100);aImg[index].style.opacity = alpha / 100;aImg[index].style.filter = "alpha(opacity = " + alpha/100 + ")";alpha == 100 && clearInterval(timer);},40)}

2. Get and set the attribute values of element objects:

Key points: obj. currentStyle [attr]; getComputedStyle (obj, null) [attr];

Function css (obj, attr, val) {switch (arguments. length) {case 2: if (typeof arguments [1] = "string") {return obj. currentStyle? Obj. currentStyle [attr]: getComputedStyle (obj, null) [attr];} else {for (var I in attr) {obj. style [I] = attr [I] ;}} break; case 3: obj. style [attr] = val; break; default: alert ("error parameter ");}}

The above is a collection of JS function code that I will introduce to you. I hope it will be helpful to you!