Question

Is there a way to detect if the javascript see if there was a click, and if there was, it can do something?

function clickin() {
    var mouseDown = 0;
    document.body.onmousedown = function() {
        ++mouseDown;
        var alle = document.getElementsByClassName('box');
        for (var i = 0; i < alle.length; i++) {
            value = "this.title='1'"
            alle[i].setAttribute("onmouseover", value);
        }
        document.body.onmouseup = function() {
            --mouseDown;
            var alle = document.getElementsByClassName('box');
            for (var i = 0; i < alle.length; i++) {
                value = "0"
                alle[i].setAttribute("onmouseover", value);
            }
        }
    }
}​

Answer 1

And the question is?
You have already the code.

Anyway, from my point of view, go for jQuery and it’s mouse events.