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>"
)
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"
))