[javascript] Add click event on div tag using javascript

I have a div tag in my form without id property. I need to set an on-click event on this div tag.

My HTML code:

<div class="drill_cursor" >
....
</div>

I don't want to add an id property to my div tag.

How can I add an on-click event on this tag using Javascript?

Separate function to make adding event handlers much easier.

function addListener(event, obj, fn) {
    if (obj.addEventListener) {
        obj.addEventListener(event, fn, false);   // modern browsers
    } else {
        obj.attachEvent("on"+event, fn);          // older versions of IE
    }
}

element = document.getElementsByClassName('drill_cursor')[0];

addListener('click', element, function () {
    // Do stuff
});

the document class selector:

document.getElementsByClassName('drill_cursor')[0].addEventListener('click',function(){},false)

also the document query selector https://developer.mozilla.org/en-US/docs/Web/API/document.querySelector

document.querySelector(".drill_cursor").addEventListener('click',function(){},false)

Just add the onclick-attribute:

<div class="drill_cursor" onclick='alert("youClickedMe!");'>
....
</div>

It's javascript, but it's automatically bound using an html-attribute instead of manually binding it within <script> tags - maybe it does what you want.

While it might be good enough for very small projects or test pages, you should definitly consider using addEventListener (as pointed out by other answers), if you expect the code to grow and stay maintainable.

Recommend you to use Id, as Id is associated to only one element while class name may link to more than one element causing confusion to add event to element.

try if you really want to use class:

 document.getElementsByClassName('drill_cursor')[0].onclick = function(){alert('1');};

or you may assign function in html itself:

<div class="drill_cursor" onclick='alert("1");'>
</div>

Try this:

 var div = document.getElementsByClassName('drill_cursor')[0];

 div.addEventListener('click', function (event) {
     alert('Hi!');
 });