window.onload=function(){

?var odiv = document.getElementById('div1');

?odiv.onmouseover = function(){

?startmove(100);

?}

?odiv.onmouseout = function(){

?startmove(30);

?} ?

}

var timer = null;

var alpha = 30;

function startmove(target){

var odiv = document.getElementById("div1");

clearInterval(timer);

timer = setInterval(function(){

var speed = 0;

if(alpha > target){

speed = -10;

}else{

speed = 10;

}

腦子已經(jīng)懵掉了，求大神解釋一下。target的代入值不是100和30么，，var alpha=30， 那么為什么會(huì)出現(xiàn)alpha>target的情況??？就算后面alpha+=speed，那么觸發(fā)onmouseover時(shí)，alpha和target的值一開(kāi)始都是30，就清除計(jì)時(shí)器了啊，懵逼=。=大寫(xiě)