JavaScript字符串对象(string)基本用法

1.获取字符串的长度：

var s = "Hello world";

document.write("length:"+s.length);

2.为字符串添加各种样式

var txt = "Some words";

document.write("<p>Big: " + txt.big() + "</p>")

document.write("<p>Small: " + txt.small() + "</p>")

document.write("<p>Bold: " + txt.bold() + "</p>")

document.write("<p>Italic: " + txt.italics() + "</p>")

document.write("<p>Blink: " + txt.blink() + " (does not work in IE)</p>")

document.write("<p>Fixed: " + txt.fixed() + "</p>")

document.write("<p>Strike: " + txt.strike() + "</p>")

document.write("<p>Fontcolor: " + txt.fontcolor("Red") + "</p>")

document.write("<p>Fontsize: " + txt.fontsize(16) + "</p>")

document.write("<p>Link: " + txt.link("http://www.jb51.net") + "</p>")

3.获取字符串中部分内容首次出现的位置：

var hw_text = "Hello world";

document.write(hw_text.indexOf("Hello")+"<br/>");

document.write(hw_text.indexOf("world")+"<br/>");

document.write(hw_text.indexOf("abc")+"<br/>");

4.内容替换：

var str="Visit Microsoft!"

document.write(str.replace(/Microsoft/,"W3School"))