WMLScript subString() 函数

subString() 函数返回字符串的指定部分。

语法

n = String.subString(string, start, length)

例子

var a = String.subString("world",2,2);
var b = String.subString("world",0,5);
var c = String.subString("world",-2,3);
var d = String.subString("world",2,10);
var e = String.subString("world",10,10);

结果

a = "rl"
b = "world"
c = "wor"
d = "rld"
e = ""