無法通過JavaScript訪問變量 - 範圍錯誤？

Question

我有一個單獨的.js文件類似這樣一些數據：

data = new Object(); 
data['cat'] = ['Mr. Whiskers','Wobbles']; 
data['dog'] = ['Toothy']; 
data['fish'] = ['goldy','roose']; 

function getStuff(info) 
{ 
    var stuff = data[info.value]; 
    return stuff; 
} 

與塊的其他的HTML文件

現在，我有這樣的事情：

function theDrop(dynamic) { 
    alert(getStuff(dynamic)); 
} 

盒子說：undefined，爲什麼？

Answer 1

你通過了什麼theDrop？如果你要撥打的.value那麼你需要傳遞整個對象了，否則你會得到undefined

Live Demo

var select = document.getElementById("selectme"); 

select.onchange = function(){ 
    theDrop(this); 
} 

data = new Object(); 
data['cat'] = ['Mr. Whiskers','Wobbles']; 
data['dog'] = ['Toothy']; 
data['fish'] = ['goldy','roose']; 

function getStuff(info) 
{ 
    var stuff = data[info.value]; 
    return stuff; 
} 

function theDrop(dynamic) { 
    alert(getStuff(dynamic)); 
}