案例2
计算长方形的面积
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
function calRet(w,h){
var w;
var h;
var area=w*h;
console.log(area);
}
calRet(20,10);
</script>
</body>
</html>
案例3:多个函数参数
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
function person(name,age,gender){
var man='先生';
if (!gender) {
man='女士';
}document.write('欢迎'+name+man+'到校访问,年龄为:'+age+'<br>');
}
person('小强',60,true);
person('小强',60,false);
</script>
</body>
</html>
案例4:时间调用
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
var o=document.getElementById('box');
function showTime(){
//获取年,月,日
var date = new Date;
var year=date.getFullYear();
var month=date.getMonth()+1;
var day=date.getDate();
//获取时,分,秒
var hour=date.getHours();
var minute=date.getMinutes();
var second=date.getSeconds();
hour=add(hour);
minute=add(minute);
second=add(second);
time=year+'/'+month+'/'+day+' '+hour+':'+minute+':'+second;
o.innerHTML=time;
}
function add(num){
if (num<10) {
num='0'+num;
}
return num;
}
showTime();
setInterval(showTime,1000);
</script>
</body>
</html>