1. Imitate fade in(), 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 value of the element object:
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 the relevant content of the JS function code highlights introduced to you by the editor. I hope it will be helpful to you!