//隔行變色===》余數(shù)的應(yīng)用
window.onload = function () {
var aLi = document.getElementsByTagName('li');
for (var i = 0; i < aLi.length; i++) {
if(i%2 == 0){//取模就是取余數(shù)
aLi[i].style.background = '#ccc';
}else{
aLi[i].style.background = '#abcdef';
}
}
}
