没有 jQuery 的 OnClick [英] OnClick without jQuery

问题描述

如何制作onclick 无 jQuery，在HTML中没有额外的代码，如:

How to make onclick without jQuery, with no extra code in HTML, such as:

<a href="#" onclick="tramtramtram">

只使用外部js文件?

<script type="text/javascript" src="functions.js"></script>

<小时>

我需要替换这段代码:

---

I need to replace this code:

$("a.scroll-up, a.scroll-down").click(function(){
    SNavigate($(this).attr("href").substr(7));return false;
});

推荐答案

当这个锚点只包含一个处理点击的函数时，你可以写

When this anchor will contain only one function to handle on click, than you can just write

document.getElementById('anchorID').onclick=function(){/* some code */}

否则，你必须使用 DOM 方法 addEventListener

otherwise, you have to use DOM method addEventListener

function clickHandler(){ /* some code */ }
var anchor = document.getElementById('anchorID');
if(anchor.addEventListener) // DOM method
  anchor.addEventListener('click', clickHandler, false);
else if(anchor.attachEvent) // this is for IE, because it doesn't support addEventListener
   anchor.attachEvent('onclick', function(){ return clickHandler.apply(anchor, [window.event]}); // this strange part for making the keyword 'this' indicate the clicked anchor

还记得在加载所有元素时调用上述代码(例如在 window.onload 上)

also remember to call the above code when all elements are loaded (eg. on window.onload)

--编辑

我看到你添加了一些细节.如果你想替换下面的代码

I see you added some details. If you want to replace the code below

$("a.scroll-up, a.scroll-down").click(function(){SNavigate($(this).attr("href").substr(7));return false;});

对于不使用 jQuery 的东西，这应该可以完成工作

with sth that doesn't use jQuery, this should do the job

function addEvent(obj, type, fn) {
        if (obj.addEventListener)
                obj.addEventListener(type, fn, false);
        else if (obj.attachEvent)
                obj.attachEvent('on' + type, function() { return fn.apply(obj, [window.event]);});
}
addEvent(window, 'load', function(){
   for(var i=0, a=document.anchors, l=a.length; i<l;++i){
      if(a[i].className == 'scroll-up' || a[i].className == 'scroll-down'){
         addEvent(a[i], 'click', function(e){ SNavigate(this.href.substr(7)); e.returnValue=false; if(e.preventDefault)e.preventDefault();return false});
      }
   }
});

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