day9

<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″ />
<title></title>
</head>
<body>
<!–<script>
function ji(){

var sum=0;
for(var i=1;i<100;i=i+2){

sum=sum+i;
}
document.write(“100以内奇数求和为”+sum);
}
</script>
<button οnclick=”ji()”>100以内奇数求和为</button>–>
<script>
function ou(){

var sum=0;
for(var i=1;i<=100;i=i+1){

if(i%2==0){

sum=sum+i;
}
}
document.write(“100以内的偶数求和为”+sum);
}
</script>
<button οnclick=”ou()”>100以内偶数求和为</button>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset=”UTF-8″>
<title></title>
</head>
<body>
<script>
function caishu(){

var a=parseInt(Math.random()*100);
var cishu=0;
for(;;){

cishu=cishu+1;
var b=prompt(“请输入你猜的数字1-100”);
if(b<a){

alert(“你输入的小了”);
}else if(b>a){

alert(“你输入的大了”);
}else{

alert(“恭喜你才对了”);
break;
}
if(cishu==10){

document.write(“不好意思你输得次数多了”)
break;
}
}
document.write(“你共输入”+cishu+”次数”)
}
</script>
<button οnclick=”caishu()”>次数</button>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset=”UTF-8″>
<title></title>
</head>
<body>
<script>
function xinhang(){

for(;;){

var a=prompt(“—1查询—2取款—3转账—-0退出–“);
if(a==1){

alert(“查询”);
}else if(a==2){

alert(“取款”);
}else if(a==3){

alert(“转账”);
}else if(a==0){

alert(“退出”);
break;
}else{

alert(“你输入错误请从新输入”);
}
}
}
</script>
<button οnclick=”xinhang()”>客服</button>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset=”UTF-8″>
<title></title>
</head>
<body>
<script>
function shui(){

var shui=parseInt(prompt(“个人月收入”));
if(shui<=3500){

alert(“你好你免税”);
}else if(shui<=5000){

shui=(shui-3500)*0.03;
alert(“你好你交税”+shui);
}else if( shui<=9000){

shui=(5000-3500)*0.03+(shui-5000)*0.1;
alert(“你好你交税”+shui);
}else if( shui>9000){

shui=(5000-3500)*0.03+(9000-5000)*0.1+(shui-9000)*0.2;
alert(“你好你交税”+shui);
}
}
</script>
<button οnclick=”shui()”>税收查询</button>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset=”UTF-8″>
<title></title>
</head>
<body>
<script>
function koujue(){

var a=prompt(“请输入数字”);
var num=0;
for(var b=1;b<=a;b++){

num=b*a
document.write(b+”*”+a+”=”+num);
document.write(‘<br/>’);
}
}
</script>
<button οnclick=”koujue()”>乘法</button>
</body>
</html>