📄 2-39.html
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Math.random()</title>
<script language="javascript">
function selectFrom(iFirstValue, iLastValue){
var iChoices = iLastValue - iFirstValue + 1; //计算项数
return Math.floor(Math.random()*iChoices+iFirstValue);
}
var iNum = selectFrom(2,99); //随机选择数字
var aFruits = ["apple","pear","peach","orange","watermelon","banana"];
//随机选择数组元素
var sFruit = aFruits[selectFrom(0,aFruits.length-1)];
alert(iNum + " " + sFruit);
</script>
</head>
<body>
</body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -