Trigger Button Click on Short Cut Key

var isCtrl = false;
document.attachEvent('onkeyup', KeyUpHandler);
document.attachEvent('onkeydown', KeyDownHandler);
 
function KeyUpHandler()
{
if (event.keyCode == 17)
{
isCtrl=false;
}
}
 
function KeyDownHandler()
{
if (event.keyCode == 17)
{
isCtrl=true;
}
if (event.keyCode == 83 && isCtrl == true)
{
' call button save click event document.getElementById(btnSave).click();
}
else if (event.keyCode == 67 && isCtrl == true)
{
' call button close click event document.getElementById(btnClose).click();
}
}

or this one.....

if (window.captureEvents) {
    window.captureEvents(Event.KeyUp);
    window.onkeyup = executeCode;
}
else if (window.attachEvent) {
    document.attachEvent('onkeyup', executeCode);
}
 
function executeCode(evt) {
    if (evt == null) {
        evt = window.event;
    }
    var theKey = parseInt(evt.keyCode, 10);
    switch (theKey) {
        case 113:  // F2
            document.getElementById('buttonid').click();
            break;
        case 119:  // F8
            document.getElementById('buttonid').click();
            break;
        case 120:  // F9
            document.getElementById('buttonid').click();
            break;
        case 87: //w
            if (window.event.altKey)
                document.getElementById('buttonid').click();
            break;
    }
    evt.returnValue = false;
    return false;
}