console
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title></title>
</head>
<body>
<script type="text/javascript">
var globalVariable1 = 0;
function test1() {
var localVariable1 = 2;
document.write(globalVariable1 + "<br/>");
document.write(localVariable1+ "<br/>");
}
test1();
var globalVariable2 = 1;
function test2() {
var localVariable2 = 3;
}
test2();
document.write(globalVariable1 + "<br/>");
function sum(i)
{
return ++i;
}
var i=2;
document.write(i+=sum(i));
document.write("<br>");
function welcomeMes()
{
document.write("Hello kitty");
}
function isLeapYear(year)
{
if(year%4==0&&year%100!=0||year%400==0)
{
document.write(year+"是闰年<br>");
}
else {
document.write(year+"不是闰年<br>");
}
}
isLeapYear(2020);
isLeapYear(2000);
isLeapYear(2001);
function max(num)
{
var max;
if(num[0]>num[1]) max=num[0];
else max=num[1];
for(var i=2;i<num.length;++i)
{
if(num[i]>max)
{
max=num[i];
}
}
return max;
}
function min(num)
{
var min;
if(num[0]<num[1]) mmin=num[0];
else min=num[1];
for(var i=2;i<num.length;++i)
{
if(num[i]<min)
{
min=num[i];
}
}
return min;
}
function bubbleSort(num)
{
for(var i=1;i<num.length;++i)
{
if(num[i-1]>num[i])
{
var temp=num[i];
num[i]=num[i-1];
num[i-1]=temp;
}
}
return num[i-1];
}
var arr=[25,19,21,17];
document.write(max(arr)+'<br>');
document.write(min(arr)+'<br>');
document.write(bubbleSort(arr)+'<br>');
</script>
<a href="JavaScript:welcomeMes()">Welcome</a>
</body>
</html>