A_forever的代码

3-3 谁是团里成员（数组赋值）

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>数组赋值</title>

<script language="javascript">

    var myarr = new Array();

    myarr[0] = 88;

    myarr[1] = 90;

    myarr[2] = 68;

  document.write("数组第一个值是:"+myarr[0]+"<br>");

  document.write("数组第二个值是:"+myarr[1]+"<br>");

  document.write("数组第三个值是:"+myarr[2]+"<br>");

</script>

</head>

<body>

</body>

</html>

2015-07-17 查看完整代码

3-2 组团，并给团取个名（如何创建数组）

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>创建数组</title>

<script type="text/JavaScript">

    var myarr = new Array();

 document.write("数组的第一个值："+myarr[0]);

</script>

</head>

<body>

</body>

</html>

2015-07-17 查看完整代码

3-1 一起组团（什么是数组）

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>什么是数组</title>

<script type="text/javascript">

 var myarr=new Array(); //定义数组

 myarr[0]=80; 

 myarr[1]=60;

 myarr[2]=99;

 document.write("第一个人的成绩是:"+myarr[0]);

 document.write("第二个人的成绩是:"+myarr[1]);

 document.write("第三个人的成绩是:"+myarr[2]);

</script>

</head>

<body>

 </html>

2015-07-17 查看完整代码

2-13 编程练习

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>JS基础</title>

<script type="text/javascript">

  var a,b,sum;

  var  a  = 5;

  var  b  = 100%7;  

  sum = a > b && a*b > 0 ;

  document.write( "我认为 a 的值是:" + 5  + " b的值是:" + 7 + "sum 的值是:" +　?+"<br/>");

  document.write( "答案是,第一轮计算后，a 为："+ a +";b为："+b +";第一次计算sum为："+ sum +"<br/>");



  sum = ( (++a) + 3 ) / (2 - (--b) ) * 3;  

  document.write( "再一次计算后，我认为 a 的值是:" +  ?  + " b的值是:" +  ? + "sum 的值是:" +  ? +"<br/>"); 

  document.write( "答案是，第二轮计算后，a 为：" + a + ";b为：" + b +";第二次计算sum为："+ sum +",sum的类型也发生变化了。");



</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-12 保持先后顺序(操作符优先级）

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>操作符优先级</title>

<script type="text/javascript">

var numa,numb,jq1;

numa=5;

numb=2;

jq1=numa + 30 >10 && numb * 3<20;

jq2=((numa + 30) / (7-numb)) * 3

document.write("jq1的值是:"+jq1+"<br>");

document.write("jq2的值是:"+jq2);

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-11 是非颠倒(逻辑非操作符）

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>逻辑非</title>

<script type="text/javascript">

var numa,numb,jq1;

numa=60;

numb=70;

jq1=!(numa<numb);

document.write("jq1的值是:"+jq1+"<br>")

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-10 我或你都可以 (逻辑或操作符）

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>逻辑或</title>

<script type="text/javascript">

var numa,numb,jq1;

numa=50;

numb=55;

jq1=numa>numb||numa==numb;

document.write("jq1的值是:"+jq1+"<br>")

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-8 较量较量(比较操作符)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>比较操作符</title>

<script type="text/javascript">

var numa,numb,jq1,jq2;

numa=1;

numb=7;

jq1=numa>numb;

jq2=numa!=numb;

document.write("numa大于numb的分数吗？"+jq1+"<br>")

document.write("numa不等于numb的分数吗？"+ jq2);

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-7 自加一，自减一 ( ++和- -)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>++/--</title>

<script type="text/javascript">

var numa=1;

var numb=7;

numa++;

numb--;

document.write("numa的值:"+numa);

document.write("numb的值:"+numb);

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-6 我还有其它用途( +号操作符）

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>+操作符</title>

<script type="text/javascript">

  var mynum=1+5         ;

  var mychar="中"+"国"         ;

  document.write("mynum的值:"+mynum+"<br>");

  document.write("mychar的值:"+mychar);

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-5 表达出你的想法(表达式)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>表达式</title>

<script type="text/javascript">

    var num1 = 5;

    var num2 = 6; 

  document.write("小明还剩:"+num1+"元"+"<br>");

  document.write("小红花:"+num2+"元买个铅笔盒");

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-4 多样化的我(变量赋值）

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>变量赋值</title>

<script type="text/javascript">

    var num1 = 10;

    var num2 = "JS";

 document.write("num1的值是:"+num1);

 document.write("num2的值是:"+num2);

</script>

</head>

<body>

</html>

2015-07-16 查看完整代码

2-3 确定你的存在(变量声明)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>声明变量</title>

<script type="text/javascript">

  var mya;

  mya=5;

  alert("mya的值是:"+mya);

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-2 给变量取个名字(变量命名)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>变量命名</title>

<script type="text/JavaScript">

var     ;

</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

2-1 什么是变量

2015-07-16 查看完整代码

1-2 编程练习

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>系好安全带,准备启航</title>

<!--引入外部文件的方式-->



<script type="text/javascript">

//多行注释

/*  我是多行注释！

  我需要隐藏，

  否则会报错哦！

*/

//在页面中显示文字

    document.write("系好安全带,准备启航--目标JS")



//页面中弹出提示框

    alert("准备好了，起航吧！");



//单行注释

   //我是单行注释，我也要隐藏起来！



</script>

</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

1-1 让你认识JS

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>我们互动下</title>

<script type='text/javascript'>

    document.write("JS进阶篇");

    alert("关注JS高级篇");

</script>





</head>

<body>

</body>

</html>

2015-07-16 查看完整代码

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