问是否有办法以编程方式判断单击某个元素是否会产生任何效果？

EN

​$._data( $("#yourelement")[0], "events" );

<a id="p1">I am link 1</a>
<a onclick="javascript:alert('hi');">I am link 2</a>
<a>I am link 3</a>
<a>I am link 4</a>

$(document).ready(function()
{
    // Add inline event to a link element
    document.getElementById('p1').onclick = function() { alert('hi'); };
    $('a').each(function()
    {
        if(this.onclick == null)
        {
            alert("Link " + this.innerText + " does not have a onclick event");
        }
        else
        {
            alert("Link " + this.innerText + " does have a onclick event");
        }
    });             
});