Detect left mouse button press

Question

I hate this mess with the mouse buttons created by W3C an MS! I want to know if the left mouse button is pressed when I get a mousedown event.

I use this code

Answer 1

Updated answer. The following will detect if the left and only the left mouse button is pressed:

function detectLeftButton(evt) {
    evt = evt || window.event;
    if ("buttons" in evt) {
        return evt.buttons == 1;
    }
    var button = evt.which || evt.button;
    return button == 1;
}

For much more information about handling mouse events in JavaScript, try http://unixpapa.com/js/mouse.html