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<!DOCTYPE HTML><html lang="en-US"><head> <meta charset="UTF-8"> <title>2.11.JavaScript.多维数组</title> <style type="text/css"> *{ margin:0; padding:0; } body{ background-color:#333; padding:20px; font:12px Verdana,Gene... 阅读全文
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<!DOCTYPE HTML><html lang="en-US"><head><meta charset="UTF-8"><title>数组</title></head><body><script type="text/javascript">/*var arr1 = new Array("xiaozhang","a4","zhaolin");var arr2 = [ 阅读全文
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<!DOCTYPE HTML><html lang="en-US"><head><meta charset="UTF-8"><title>javascript不同数据类型的转换</title></head><body><script type="text/javascript">/*var result = 100 + "100";//声明一个变量document.write( "计算出的结果是：& 阅读全文
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<!DOCTYPE HTML><html lang="en-US"><head><meta charset="UTF-8"><title>内置对象</title></head><body><script type="text/javascript">/*var email = prompt("请输入电子邮箱地址","xiaozhanga4@gmail.com");document.writ 阅读全文
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<!DOCTYPE HTML><html lang="en-US"><head> <meta charset="UTF-8"> <title>null和undefined</title></head><body> <script type="text/javascript"> var a;//定义变量但没有类型所以输出为undefinedvar b = null ;//定义变量并制定值为null document.write( 阅读全文