<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title ></title>
<script>
window.alert(5 + 6);
</script>
<script>
ducument.getElementById("in").innerHTML="我是html输入的语句";
</script>
<script>
document.write(Date());
var a= new Date();
var b=a.getYear();
if(b>7){
document.write("今年shi"+b);
window.alert("b");
}
</script>
<script>
var a=1;
var b=3;
var c=a+b;
console.log(c);
</script>
</head>
<body>
</body>
</html>
第一节javascript的样式设置
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<!DOCTYPE html
> <html> <head> <meta charset=
"UTF-8"> <title ></title> <script> document.write("
<font size=
7> 谁在悬崖沏一壶茶
</font>"); document.write("
<body bgcolor=
'#0000FF' text=
'red' </body>");
</script> </head> <body> </body> </html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title ></title>
<script>
document.write("<font size=7> 谁在悬崖沏一壶茶 </font>");
document.write("<body bgcolor='#0000FF' text='red' </body>");
</script>
</head>
<body>
</body>
</html>
第二章javascript typeof
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<!DOCTYPE html
> <html> <head> <meta charset=
"utf-8"> <title></title> </head> <body> <p> typeof 操作符返回变量、对象、函数、表达式的类型。
</p> <p id=
"demo"></p> <script> document.getElementById("demo")
.innerHTML =
typeof "john" + "
<br>" + typeof 3.14 + "
<br>" + typeof NaN + "
<br>" + typeof false + "
<br>" + typeof [1,2,3,4] + "
<br>" + typeof {name:'john', age:34} + "
<br>" + typeof new Date() + "
<br>" + typeof function () {} + "
<br>" + typeof myCar + "
<br>" + typeof null;
</script> </body> </html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<p> typeof 操作符返回变量、对象、函数、表达式的类型。</p>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML =
typeof "john" + "<br>" +
typeof 3.14 + "<br>" +
typeof NaN + "<br>" +
typeof false + "<br>" +
typeof [1,2,3,4] + "<br>" +
typeof {name:'john', age:34} + "<br>" +
typeof new Date() + "<br>" +
typeof function () {} + "<br>" +
typeof myCar + "<br>" +
typeof null;
</script>
</body>
</html>
第三章javascript的onclick事件
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<!DOCTYPE html
> <html> <head> <meta charset=
"utf-8"> <title></title> </head> <body> <p> typeof 操作符返回变量或表达式的类型。
</p> <button onclick=
"myFunction()">点我
</button> <p id=
"demo"></p> <script> function myFunction() { var
y =
1; var
x =
2; document.getElementById("demo")
.innerHTML =
y+ x; }
</script> </body> </html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<p> typeof 操作符返回变量或表达式的类型。</p>
<button οnclick="myFunction()">点我</button>
<p id="demo"></p>
<script>
function myFunction() {
var y = 1;
var x =2;
document.getElementById("demo").innerHTML =
y+ x;
}
</script>
</body>
</html>
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