隔行变色===》余数的应用

//隔行变色===》余数的应用

window.onload = function () {

var aLi = document.getElementsByTagName('li');

for (var i = 0; i < aLi.length; i++) {

if(i%2 == 0){//取模就是取余数

aLi[i].style.background = '#ccc';

}else{

aLi[i].style.background = '#abcdef';

}

}

}