JavaScript就这么回事 (JS基础知识整理)

JavaScript就这么回事 (JS基础知识整理)
1 创建脚本块  
1: <script language=”JavaScript”>  
2: JavaScript code goes
here  
3: </script>
2 隐藏脚本代码  
1: <script language=”JavaScript”>  
2: <!–  
3:
document.write(“Hello”);  
4: // –>  
5: </script>
在不支持JavaScript的浏览器中将不执行相关代码  
3 浏览器不支持的时候显示  
1: <noscript>  
2: Hello to the non-JavaScript browser.  
3:
</noscript>
4 链接外部脚本文件  
1: <script language=”JavaScript”
src=”/”filename.js””></script>
5 注释脚本  
1: // This is a comment  
2: document.write(“Hello”); // This is a
comment  
3: /*  
4: All of this  
5: is a comment  
6: */
6 输出到浏览器  
1: document.write(“<strong>Hello</strong>”);
7 定义变量  
1: var myVariable = “some value”;
8 字符串相加  
1: var myString = “String1” + “String2”;
9 字符串搜索  
1: <script language=”JavaScript”>  
2: <!–  
3: var myVariable
= “Hello there”;  
4: var therePlace = myVariable.search(“there”);  
5:
document.write(therePlace);  
6: // –>  
7: </script>
10 字符串替换  
1: thisVar.replace(“Monday”,”Friday”);
11 格式化字串  
1: <script language=”JavaScript”>  
2: <!–  
3: var myVariable
= “Hello there”;  
4: document.write(myVariable.big() +
“<br>”);  
5: document.write(myVariable.blink() +