Is it possible to simulate a click on a webpage using javascript but without defining a specific element, but rather just specifying the document?

I would have liked to do something like this, and if the location happens to have a link, then this will be pressed:

function simulateClick(x, y) 
{
    var evt = window.createEvent("MouseEvents");
    evt.initMouseEvent("click", true, true, window,
        x, y, x, y, 1, false, false, false, false, 0, null);

    window.dispatchEvent(evt);
}