diff --git a/first/.keep b/first/.keep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/first/EvenNumber.js b/first/EvenNumber.js
new file mode 100644
index 0000000000000000000000000000000000000000..98af3f11368fdf4b05ef1d00ca3c648729c6bd95
--- /dev/null
+++ b/first/EvenNumber.js
@@ -0,0 +1,5 @@
+// 8创建一个函数用以判断给定的数字是否是偶数。例如：给函数传递参数12，返回true。
+function IsEvenNubers(num){
+    if(num%2==0) return num;
+}
+alert(IsEvenNubers(12))
\ No newline at end of file
diff --git a/first/IsPrimeNumber.js b/first/IsPrimeNumber.js
new file mode 100644
index 0000000000000000000000000000000000000000..7c1750bc5d58d6580653af37d8eb58167ce98375
--- /dev/null
+++ b/first/IsPrimeNumber.js
@@ -0,0 +1,14 @@
+// 2创建一个函数用以判断一个数字是否是质数。例如：给函数传递参数5，返回true；给定函数4，返回false
+function IsPrimeNumber(num){
+    if(num < 2) return false;
+    let IsPrimeNumber = true;
+    for(let i=2;i<num;i++){
+        if(num%i==0){
+            IsPrimeNumber = false;
+            break;
+        }
+    }
+    return IsPrimeNumber;
+}
+let isPrimeNumber = IsPrimeNumber(4);
+alert(isPrimeNumber);
\ No newline at end of file
diff --git a/first/Narcissus number.js b/first/Narcissus number.js
new file mode 100644
index 0000000000000000000000000000000000000000..6ac53e65948b7ae14a1736973f33b1fd3f94d085
--- /dev/null
+++ b/first/Narcissus number.js	
@@ -0,0 +1,13 @@
+// 5创建一个函数用以判断一个数字是否是水仙花数。例如：给函数传递参数153，返回true
+function IsNarcissusNumber(num){
+    var length=num.toString().length;
+    var content=num.toString().split("");
+    var result=0;
+    for(var i=0;i<content.length;i++){
+        result+=Math.pow(content[i],length)
+    }
+    if(result==num) return true
+    else return false
+}
+IsNarcissusNumber(153)
+console.log(IsNarcissusNumber(153))
\ No newline at end of file
diff --git a/first/countEvenNumbers.js b/first/countEvenNumbers.js
new file mode 100644
index 0000000000000000000000000000000000000000..96b86a6cf8857f528ed9d8afc32e81c77184613d
--- /dev/null
+++ b/first/countEvenNumbers.js
@@ -0,0 +1,9 @@
+// 9创建一个函数用以计算出给定区间内的偶数的数量。例如：给函数传递参数1、10，返回5。
+function CountEvenNubers(x1,x2){
+    var count = 0;
+    for(var i=x1;i<=x2;i++){
+        if(IsEvenNubers(i)) count++;
+    }
+    return count;
+}
+alert(CountEvenNubers(1,10));
\ No newline at end of file
diff --git a/first/liuxf_homework.html b/first/liuxf_homework.html
new file mode 100644
index 0000000000000000000000000000000000000000..ae6b91affe97313086122f09a4a9d7dc1aee6997
--- /dev/null
+++ b/first/liuxf_homework.html
@@ -0,0 +1,83 @@
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>刘新飞testHomework</title>
+
+</head>
+<body>
+
+
+<style type="text/css">
+    body,p{
+        margin: 0;
+    }
+    body{
+        background-color: #000;
+    }
+    div{
+        position: relative;
+        width: 50px;
+        height: 150px;
+        margin: 100px auto;
+        animation: change 1s infinite alternate;
+    }
+    div p{
+        position: absolute;
+        top: 0;
+        width: 100px;
+        height: 120px;
+        background-color: #f00;
+        border-radius: 50px 50px 0 0;
+        transform: rotate(60deg);
+        animation: changeshadow 1s infinite alternate;
+    }
+    div.right{
+        left: -54px;
+        transform: rotate(60deg);
+    }
+    @keyframes change {
+        to{
+            transform: scale(1.2);
+        }
+    }
+    @keyframes changeshadow {
+        from{
+            box-shadow: 0 0 10px red;
+        }
+        to{
+            box-shadow: 0 0 180px red;
+        }
+    }
+    h1{
+        font-size: 100px;
+        color: red;
+        text-align: center;
+        text-shadow: 0 15px 50px red;
+    }
+
+</style>
+
+<div>
+    <p class="left">ZH</p>
+    <p class="right"><a href="http://123.125.115.110">fly</a></p>
+</div>
+<h2>
+    <a href="https://www.cnblogs.com/MrLiu199903/" style="color: red">By: AttentionToDetail</a>
+</h2>
+
+    <script src="max.js">practise1</script>
+    <script src="IsPrimeNumber.js">practise2</script>
+    <script src="primeNumber1to1000.js">practise3</script>
+    <script src="threeToMax.js">practise4</script>
+    <script src="Narcissus%20number.js">practise5</script>
+    <script src="selectNarcissusNumber.js">practise6</script>
+    <script src="strBack.js">practise7</script>
+    <script src="EvenNumber.js">practise8</script>
+    <script src="countEvenNumbers.js">practise9</script>
+    <script src="paixu.js">practise10</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/first/max.js b/first/max.js
new file mode 100644
index 0000000000000000000000000000000000000000..564017c069004b8db65988157e7bff356b51fdba
--- /dev/null
+++ b/first/max.js
@@ -0,0 +1,7 @@
+// 1创建一个函数用以找到两个数字中较大的数。例如：给函数传递参数4、5，返回5。
+function MaxNum(x1,x2){
+    if(x1>=x2) return x1;
+    else return x2;
+}
+let maxnum = MaxNum(4,5)
+alert(maxnum)
\ No newline at end of file
diff --git a/first/paixu.js b/first/paixu.js
new file mode 100644
index 0000000000000000000000000000000000000000..036ac88af1e319921b718d98df73b1dd87dfc7ea
--- /dev/null
+++ b/first/paixu.js
@@ -0,0 +1,7 @@
+// 10创建一个函数用以将给定的三个数字按从小到大的顺序输出。例如：给函数传递6、4、5，函数运行时会输出4 5 6
+function PaiXu(num1,num2,num3){
+    var arr = [num1,num2,num3].sort()
+    console.log(arr[0] + '<' + arr[1] + '<' + arr[2]);
+    alert(arr[0] + '<' + arr[1] + '<' + arr[2]);
+}
+PaiXu(3,5,2)
\ No newline at end of file
diff --git a/first/primeNumber1to1000.js b/first/primeNumber1to1000.js
new file mode 100644
index 0000000000000000000000000000000000000000..06c6c73df577246323162392ff9552b0c37fb912
--- /dev/null
+++ b/first/primeNumber1to1000.js
@@ -0,0 +1,17 @@
+// 3创建一个函数，运用第2题的函数找到给定区间内的质数。例如：给函数传递参数1、1000，函数将返回1-1000之间的所有质数。
+function FindPrimeNumber(start,end){
+    let arr = new Array();
+    let x = 0;
+    for(let i=start;i<=end;i++){
+        if(IsPrimeNumber(i)){
+            arr[x]=i;
+            x++;
+        }
+    }
+    return arr;
+}
+let arrF = FindPrimeNumber(2,1000);
+for(let i=0;i<arrF.length;i++){
+    console.log(arrF[i]);
+    //alert(arrF[i]);
+}
\ No newline at end of file
diff --git a/first/selectNarcissusNumber.js b/first/selectNarcissusNumber.js
new file mode 100644
index 0000000000000000000000000000000000000000..a712b47243a7b9b89b828c727a1b8078c31b0490
--- /dev/null
+++ b/first/selectNarcissusNumber.js
@@ -0,0 +1,31 @@
+// // 5创建一个函数用以判断一个数字是否是水仙花数。例如：给函数传递参数153，返回true
+// function IsNarcissusNumber(num){
+//     var length=num.toString().length;
+//     var content=num.toString().split("");
+//     var result=0;
+//     for(var i=0;i<content.length;i++){
+//         result+=Math.pow(content[i],length)
+//     }
+//     if(result==num) return true
+//     else return false
+// }
+// IsNarcissusNumber(153)
+// console.log(IsNarcissusNumber(153))
+
+
+// 6创建一个函数，运用第5题的函数找到给定区间内的所有水仙花数。
+function SelectNarcissusNumber(x1,x2){
+    var arr = new Array();
+    var x = 0;
+    for(var i=x1;i<=x2;i++){
+        if(IsNarcissusNumber(i)){
+            arr[x]=i;
+            x++;
+        }
+    }
+    return arr;
+}
+var arrFF = SelectNarcissusNumber(100,1000);
+for(let i=0;i<arrFF.length;i++){
+    console.log(arrFF[i]);
+}
diff --git a/first/strBack.js b/first/strBack.js
new file mode 100644
index 0000000000000000000000000000000000000000..c698475866da1f44bde4f9d636e838f9a7d77f78
--- /dev/null
+++ b/first/strBack.js
@@ -0,0 +1,11 @@
+// 7创建一个函数，能将给定的字符串反转后返回。例如：给函数传递参数'abc'，返回'cba'。
+function StrBack(str){
+    var i = str.length;
+    i = i - 1;
+    var str1 = ""
+    for (var x = i; x >=0; x--) {
+        str1 += str.charAt(x);
+    }
+    return str1;
+}
+alert(StrBack("abc"))
\ No newline at end of file
diff --git a/first/threeToMax.js b/first/threeToMax.js
new file mode 100644
index 0000000000000000000000000000000000000000..cd08006a5013101031619878a5c91c0238533b1a
--- /dev/null
+++ b/first/threeToMax.js
@@ -0,0 +1,17 @@
+// 4创建一个函数，用以找到三个数中最大的数并返回。例如：给函数传递参数6、4、5，返回6
+function MaxNum(x1,x2,x3){
+    if(x1>x2){
+        if(x1>x3){
+            return x1
+        }else{
+            return x3
+        }
+    }
+    else if(x2>x3){
+        return x2
+    }
+    else{
+        return x3
+    }
+}
+alert(MaxNum(6,4,5))
\ No newline at end of file
diff --git a/second/.keep b/second/.keep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/second/fly.jpg b/second/fly.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..32c281b950e7a2762cc67798ae9dc0c0b591cce4
Binary files /dev/null and b/second/fly.jpg differ
diff --git a/second/second.html b/second/second.html
new file mode 100644
index 0000000000000000000000000000000000000000..d6b59c67fe593f0271fcd3baea8cb0fa7c23ca1e
--- /dev/null
+++ b/second/second.html
@@ -0,0 +1,67 @@
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>Document</title>
+</head>
+<body>
+<div id="body">
+    <form>
+        <input id="input" />
+        <button id="buttonGet">Get!</button>
+    </form>
+    <img id="img" src="fly.jpg" style="height: 150px; margin-top: 50px" />
+    <button id="buttonHidden">隐藏</button>
+</div>
+<script>
+    //在HTML文档中创建一个div，通过JS设置其宽和高为300像素，并设置其背景颜色为橙色。
+    var mydiv = document.getElementById("body");
+    mydiv.style.height = "300px";
+    mydiv.style.width = "300px";
+    mydiv.style.background = "orange";
+
+    //在第1题的基础上，利用JS让div监听事件，当鼠标放在该元素上时，其边框为黑色虚线。
+    mydiv.onmouseover = function () {
+        mydiv.style.border = "dashed black"
+    }
+
+    mydiv.onmouseleave = function () {
+        mydiv.style.border = "";
+    };
+
+
+    //在第1题的基础上，添加一个输入框表单和一个按钮，用JS实现当鼠标放在输入框上时，输入框边框变为蓝色。
+    var myinput = document.getElementById("input");
+    myinput.onmouseover = function () {
+        myinput.style.borderColor = "blue";
+    };
+
+    myinput.onmouseleave = function () {
+        myinput.style.borderColor = "";
+    };
+
+    //在第3题的基础上，利用JS实现当鼠标点击按钮时，会将输入框里面的内容获取并弹框显示出来，若输入框为空则显示“请在输入框内输入内容”。
+    var myButtonGet = document.getElementById("buttonGet");
+
+    myButtonGet.addEventListener("click", function () {
+        myinput.value == "" ? alert("请在输入框内输入内容") : alert(myinput.value);
+    });
+
+    //在第3题的基础上，添加一个按钮和一个图片，利用JS实现当图片显示时，按钮上的文字是“隐藏”，点击该按钮，图片消失，按钮文字变为“显示”，再点击按钮，图片出现，按钮文字变为“隐藏”。
+    var myButtonHidden = document.getElementById("buttonHidden");
+    var myImg = document.getElementById("img");
+    myButtonHidden.addEventListener("click", function () {
+        if (myButtonHidden.innerHTML == "显示") {
+            myImg.style.visibility = "";
+            myButtonHidden.innerHTML = "隐藏";
+        } else {
+            myImg.style.visibility = "hidden";
+            myButtonHidden.innerHTML = "显示";
+        }
+    });
+</script>
+</body>
+</html>
\ No newline at end of file