对象字符串中的变量 [英] variable in object string

问题描述

抱歉这个愚蠢的问题，bu6我无法在任何地方找到

答案..


考虑这个无用的功能var的对象..


函数（myParam）{

var select1 = document.myForm.mySelectName;

}


我只想让这一行替换为mySelectName。带有var字符串


函数（myParam）{

var select1 = document.myForm.myParam;

}


它不起作用，我已尝试使用[] +"" ''''等..

我怎么做这个愚蠢的事情？

sorry for the stupid question, bu6 I haven''t been able to find the
answer anywhere..

consider this useless function which assigns an object to a var..

function(myParam){
var select1 = document.myForm.mySelectName;
}

I simply want this line to subsitute "mySelectName" with a var string

function(myParam){
var select1 = document.myForm.myParam;
}

It doesn''t work, ive tried umpteen variations with []+ "" '''' etc..
How would I do this stupid-simple thing?

推荐答案

bmgz写道：

bmgz wrote:

function（myParam）{
var select1 = document.myForm.myParam;

function(myParam){
var select1 = document.myForm.myParam;

var select1 = document.myForm.elements [myParam];


但在大多数情况下，您可以简单地传递对象，例如

表单或选择本身，几乎不需要传递一个字符串

来使用它来查找对象引用。


-


Martin Honnen
http：// JavaScript。 FAQTs.com/

每个对象都继承了哈希（associative array）机制，这就是

对象属性的存储方式。所以：


函数f1（propertyName）{

var myVar = someObject [propertyName];

//特定于：

// var myVar = document.formName [propertyName];

}

Each object inherits hash (associative array) mechanics, this is how
objects properties are stored. So:

function f1(propertyName) {
var myVar = someObject[propertyName];
// in the particular:
// var myVar = document.formName[propertyName];
}

bmgz写道：

[...]

bmgz wrote:
[...]

function（myParam）{
var select1 = document.myForm.myParam;
}

它没有用，我用[] +""尝试了无数的变化。 ''''等..
我怎么做这个愚蠢的简单的事情？

function(myParam){
var select1 = document.myForm.myParam;
}

It doesn''t work, ive tried umpteen variations with []+ "" '''' etc..
How would I do this stupid-simple thing?

你传递一个对象还是一个字符串？


Mick

Are you passing an object or a string?

Mick

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