// File JScript

   function noCopyMouse(e) {
        var isRight = (e.button) ? (e.button == 2) : (e.which == 3);
        
        if(isRight) {
            //alert('You are prompted to type this twice for a reason!');
            return false;
        }
        return true;
    }

    function noCopyKey(e) {
        var forbiddenKeys = new Array('c','x','v');
        var keyCode = (e.keyCode) ? e.keyCode : e.which;
        var isCtrl;

        if(window.event)
            isCtrl = e.ctrlKey
        else
            isCtrl = (window.Event) ? ((e.modifiers & Event.CTRL_MASK) == Event.CTRL_MASK) : false;
    
        if(isCtrl) {
            for(i = 0; i < forbiddenKeys.length; i++) {
                if(forbiddenKeys[i] == String.fromCharCode(keyCode).toLowerCase()) {
                    //alert('You are prompted to type this twice for a reason!');
                    return false;
                }
            }
        }
        return true;
    }
    
    // Esempio di utilizzo su una textbox
    // Textbox1.Attributes.Add("onmousedown", "return noCopyMouse(event);")
    // Textbox1.Attributes.Add("onkeydown", "return noCopyKey(event);")