javascript addEventListener在所有元素上触发

我肯定我错过了一些明显的东西，但你知道为什么下面的addEventListener代码到处都在运行吗（不仅仅是在submit按钮上）

HTML:

到

我的打字错误：（

更改此项：

if (el.addEventListener) {  
    el = addEventListener('click', validate, false);  

为此：

if (el.addEventListener) {  
    el.addEventListener('click', validate, false);  

冗长的评论

在代码中：

    // inputs is an HTMLCollection of all the inputs
    var inputs = document.getElementsByTagName('input');

    // No need for the -1
    var inputs_length = inputs.length;

    // Don't forget to declare counters too, very important
    // Just use < length
    for (var i=0; i<inputs_length; i++) {

        // Instead of this very inefficient method
        var inputs_value = document.getElementsByTagName('input')[i].value;

        // use the collection you already have
        var inputs_value = inputs[i].value;

        if (inputs_value == "") {
            alert('there is a text box empty');
        }
    }

//输入是所有输入的HTMLCollection
var inputs=document.getElementsByTagName（'input'）；
//不需要-1
var inputs_length=inputs.length；
//别忘了申报柜台，这很重要
//只需使用对于（var i=0；iCool）。为RobG的提示干杯
el.addEventListener('click', validate, false); 

if (el.addEventListener) {  
    el = addEventListener('click', validate, false);  

if (el.addEventListener) {  
    el.addEventListener('click', validate, false);  

    // inputs is an HTMLCollection of all the inputs
    var inputs = document.getElementsByTagName('input');

    // No need for the -1
    var inputs_length = inputs.length;

    // Don't forget to declare counters too, very important
    // Just use < length
    for (var i=0; i<inputs_length; i++) {

        // Instead of this very inefficient method
        var inputs_value = document.getElementsByTagName('input')[i].value;

        // use the collection you already have
        var inputs_value = inputs[i].value;

        if (inputs_value == "") {
            alert('there is a text box empty');
        }
    }