Calling Keyevent From Mouse

I need to emulate a key press with click on a link. The keyboard shortcut CTRL++ must be called with a click on a link, or a similar function.

Solution 1:

You can't invoke key press with JavaScript.

However, you can control zoom level with JavaScript, here is example for IE and Chrome: http://jsfiddle.net/cMCuz/2/

Edit: now supports Firefox as well.

Required JavaScript:

var _zoomLevel = 100;

functionChangeZoomLevel(diff) {
    _zoomLevel += diff;
    var oDiv = document.getElementById("Contents");
    if (typeof oDiv.style.MozTransform == "string")
        oDiv.style.MozTransform = "scale(" + (_zoomLevel / 100) + ")";
    elseif (typeof oDiv.style.zoom == "string")
        oDiv.style.zoom = _zoomLevel  + "%";
}

Sample buttons:

<button type="button" onclick="ChangeZoomLevel(10);">+</button>
<button type="button" onclick="ChangeZoomLevel(-10);">-</button>

This will change the zoom level of whole DIV element, can be changed easily to change zoom level of whole document if required.

Solution 2:

can i contribute please. adding on Shadow Wizard code:

http://jsfiddle.net/GaPYe/

var _zoomLevel = 100;
functionChangeZoomLevel(diff) {
    _zoomLevel += diff;
    var oDiv = document.getElementById("Contents");
    if (typeof oDiv.style.MozTransform == "string")
        oDiv.style.MozTransform = "scale(" + (_zoomLevel / 100) + ")";
    elseif (typeof oDiv.style.zoom == "string")
        oDiv.style.zoom = _zoomLevel  + "%";
        elseif (typeof oDiv.style.OTransform == "string")
        oDiv.style.OTransform = "scale(" + (_zoomLevel / 100) + ")";
            elseif (typeof oDiv.style.WebkitTransform == "string")
        oDiv.style.WebkitTransform = "scale(" + (_zoomLevel / 100) + ")";
                elseif (typeof oDiv.style.MsTransform == "string")
        oDiv.style.MsTransform = "scale(" + (_zoomLevel / 100) + ")";
                    elseif (typeof oDiv.style.transform == "string")
        oDiv.style.transform = "scale(" + (_zoomLevel / 100) + ")";
}

i think it works in all browsers now.