WMLScript replaceAt() 函数

replaceAt() 函数把字符串划分为元素，并替换一个指定的元素。

语法

n = String.replaceAt(string, substring, index, separator)

例子

var a = String.replaceAt("Visit China!","I love",0," ");
var b = String.replaceAt("Visit China!","us!",2," ");

结果

a = "I love China!"
b = "Visit us!"