函数调用函数无效，为什么

Question

function ftalk(kindOfPet)
{
if(kindOfPet == "dog")
{
document.writeln("bow-wow!");
}
else
{
if(kindOfPet == "cat")
{
document.writeln("meow-meow-meow");
}
}
}function pet(inputName, inputKind, inputColor)
{
this.name = inputName;
this.kind = inputKind;
this.color = inputColor;
this.talk = ftalk(inputkind);
}var Boots = new pet("Boots", "cat", "orange striped");
Boots.talk;
pet里不能调用ftalk？为什么？

Answer 1

function pet(inputName, inputKind, inputColor)
{
    this.name = inputName;
    this.kind = inputKind;
    this.color = inputColor;
    this.talk = ftalk(inputKind);  // 此处 inputkind 的 k 改为大写, 要仔细 - -
}