//<![CDATA[
if(document.captureEvents){
    // non IE
    if(Event.KEYUP){
        // NS 4, NS 6+, Mozilla 0.9+
        document.captureEvents( Event.KEYUP );
    }
}

function alertkey(e){
    // Internet Explorer
    if(window.event)
        if(window.event.keyCode == 26){
            if(confirm("Wilt u de inhoud van deze website bewerken?"))
                document.location = './cms/index.php';
        }

    if(!window.event)
        if((e && e.which) || e.keyCode==26){
            if(e.keyCode==26 || ( e.which==122 && e.ctrlKey))
                if(confirm("Wilt u de inhoud van deze website bewerken?"))
                    document.location = './cms/index.php';
        }
}
document.onkeypress = alertkey;
//]]>