是這樣的，我按老師教的寫了div的勻速運動函數，又寫了div的透明度變化函數。我想把兩個效果一起DOM給onmouseover，結果發現只能觸發一個函數，誰寫在前面觸發誰。這怎么辦啊，難道onmouse只能有一個動畫效果嗎？

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window.onload = function() {
?? ?var close = document.getElementById('menu');

?? ?function class1() {
?? ??? ?startMove(0),
?? ??? ?startOpactiy(100);
?? ?}

?? ?function class2() {
?? ??? ?startMove(-200),
?? ??? ?startOpactiy(30);
?? ?}
?? ?close.onmouseover = function() {
?? ??? ?class1()
?? ?};
?? ?close.onmouseout = function() {
?? ??? ?class2()
?? ?}
}
var timer = null;
var alpha = 30;

function startMove(ev) {
?? ?var close = document.getElementById('menu');
?? ?clearInterval(timer);
?? ?var speed = 0;
?? ?timer = setInterval(function() {
?? ??? ?if (close.offsetLeft < ev) {
?? ??? ??? ?speed = 10;
?? ??? ?} else {
?? ??? ??? ?speed = -10
?? ??? ?}
?? ??? ?if (close.offsetLeft == ev) {
?? ??? ??? ?clearInterval(timer)
?? ??? ?} else {
?? ??? ??? ?close.style.left = menu.offsetLeft + speed + 'px'
?? ??? ?}
?? ?}, 30)
}

function startOpactiy(target) {
?? ?var close = document.getElementById('menu');
?? ?clearInterval(timer);
?? ?var speed = 0;
?? ?timer = setInterval(function() {
?? ??? ?if (alpha > target) {
?? ??? ??? ?speed = -10;
?? ??? ?} else {
?? ??? ??? ?speed = 10;
?? ??? ?}
?? ??? ?if (alpha == target) {
?? ??? ??? ?clearInterval(timer)
?? ??? ?} else {
?? ??? ??? ?alpha += speed;
?? ??? ??? ?close.style.filter = 'alpha(opacity=' + alpha + ')';
?? ??? ??? ?close.style.opacity = alpha / 100;
?? ??? ?}
?? ?}, 30)
}