javascript基础--取余
一、隔行变色
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>各行变色</title>
<script>
window.onload = function() {
var oUl = document.getElementById('ul1');
var aLi = document.getElementsByTagName('li');
var i = 0;
for (i = 0; i < aLi.length; i++) {
if (i % 2 == 0) {
aLi[i].style.background = "#ccc";
}
}
}
</script>
</head>
<body>
<ul id='ul1'>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</body>
</html>
二、时间计算
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>时间计算</title>
<script>
window.onload = function() {
var oBtn = document.getElementById('btn');
var aTxt = document.getElementById('txt1');
oBtn.onclick = function() {
alert(parseInt(aTxt.value / 3600) + '小时' + parseInt((aTxt.value % 3600) / 60) + '分' + aTxt.value % 60 + '秒');
}
}
</script>
</head>
<body>
<input id="txt1" type="text" name="" value="">
<input id="btn" type="button" value="时间计算">
</body>
</html>
