function desabilitaBotaoDireito() {
        return false 
    } 

    document.oncontextmenu = desabilitaBotaoDireito;
   
    function onKeyPress(evt) {
        var msg = 'Função Indisponível!';

        //ESSAS SERÃO AS TECLAS DESABILITADAS
        var asciiF2        = 113;
        var asciiF3        = 114;
        var asciiF4        = 115;
        var asciiF5        = 116;
        var asciiF6        = 117;
        var asciiF11       = 122;
        var asciiF12       = 123;
        var asciiF1        = 112;
        
        var asciiCTRL       = 17;
        var asciiALT        = 18;
        var asciiMS         = 92;
        var asciiView       = 93;
        var asciiHome       = 36;
        var asciiBack       = 8;
        var asciiLeftArrow  = 37;
        var asciiRightArrow = 39;
        var asciiSHIFT      = 16;
        var asciiTab        = 9;

        //get the event object
        window.status = '';
        var oEvent = (window.event) ? window.event : evt;

        //hmmm in mozilla this is jacked, so i have to record these seperate
        //what key was pressed
        var nKeyCode =  oEvent.keyCode ? oEvent.keyCode : oEvent.which ? oEvent.which : void 0;
        var bIsFunctionKey = false;
        
        //hmmm in mozilla the keycode would contain a function key ONLY IF the charcode IS 0   
        //else key code and charcode read funny, the charcode for 't'
        //returns 116, which is the same as the ascii for F5
        //SOOO,... to check if a the keycode is truly a function key,
        //ONLY check when the charcode is null OR 0, IE returns null, mozilla returns 0

        if (oEvent.charCode == null || oEvent.charCode == 0) {
            bIsFunctionKey = (nKeyCode >= asciiF2 && nKeyCode <= asciiF12 && nKeyCode != asciiF5) ||
                                ( 
                                    nKeyCode == asciiALT
                                    || nKeyCode == asciiMS
                                    || nKeyCode == asciiView
                                    || nKeyCode == asciiHome
                                    || nKeyCode == asciiBack
                                )
        }
       
        //convert the key to a character, makes for more readable code 
        var sChar = String.fromCharCode(nKeyCode).toUpperCase();
    
        //get the active tag that has the focus on the page, and its tag type
        var oTarget = (oEvent.target) ? oEvent.target : oEvent.srcElement;
        var sTag = oTarget.tagName.toLowerCase();
        var sTagType = oTarget.getAttribute("type");
       
        var bAltPressed = (oEvent.altKey) ? oEvent.altKey : oEvent.modifiers & 1 > 0;
        var bShiftPressed = (oEvent.shiftKey) ? oEvent.shiftKey : oEvent.modifiers & 4 > 0;
        var bCtrlPressed = (oEvent.ctrlKey) ? oEvent.ctrlKey : oEvent.modifiers & 2 > 0;
        //var bMetaPressed = (oEvent.metaKey) ? oEvent.metaKey : oEvent.modifiers & 8 > 0;
    
        var bRet = true; //assume true as that will be the case most times
        //alert (nKeyCode + ' ' + sChar + ' ' + sTag + ' ' + sTagType + ' ' + bShiftPressed + ' ' + bCtrlPressed + ' ' + bAltPressed);
    
        if (sTagType != null) {
            sTagType = sTagType.toLowerCase();
        }

        //allow these keys inside a text box
        if (
                (sTag == "textarea" || (sTag == "input" && (sTagType == "text" || sTagType == "password")))
                && (
                    nKeyCode == asciiBack || nKeyCode == asciiSHIFT || nKeyCode == asciiHome || bShiftPressed
                    || (bCtrlPressed && (sChar == 'A' || sChar == 'V'))
//                    || (bCtrlPressed && (sChar == 'A' || sChar == 'C' || sChar == 'V' || sChar == 'X'))
                )
        ) {
            return true;
//        } else if (bAltPressed && (nKeyCode == asciiLeftArrow || nKeyCode == asciiRightArrow)){ // block alt + left or right arrow
//            bRet = false;
//        } else if (bCtrlPressed && (sChar == 'A' || sChar == 'C' || sChar == 'V' || sChar == 'X')){ // ALLOW cut, copy and paste, and SELECT ALL
//            bRet = false;
        } else if (bShiftPressed && nKeyCode == asciiTab){ // allow shift + tab
            bRet = true;
        } else if ((bCtrlPressed && nKeyCode != asciiCTRL) || (bShiftPressed && nKeyCode != asciiSHIFT) || (bAltPressed && nKeyCode != asciiALT)) { //block ALL other sequences, includes CTRL+O, CTRL+P, CTRL+N, etc....
            bRet = false;
        } else if (bIsFunctionKey) { // Capture and stop these keys
            bRet = false;
        }

        if(!bRet){
            try{
                oEvent.returnValue = false;
                oEvent.cancelBubble = true;
    
                if(document.all){ //IE
                    oEvent.keyCode = 0;
                }else{ //NS
                    oEvent.preventDefault();
                    oEvent.stopPropagation();
                }
                //window.status = msg;
                //alert(msg);
            }catch(ex){
                //alert(msg);
            }
        }
        return bRet;
    }

    if (document.all){ //ie has to block in the key down
        document.onkeydown = onKeyPress;
    } else if (document.layers || document.getElementById){ //NS and mozilla have to block in the key press
        document.onkeypress = onKeyPress;
    }
    
    //    function kdown() {
//        var ctrl=window.event.ctrlKey;
//        var tecla=window.event.keyCode; 

//        if (ctrl && tecla==67) {
//            alert("Impossível COPIAR !");
//            return false;
//        } else if (ctrl && tecla==78) {
//            alert("Impossível ABRIR NOVA JANELA !");
//            return false;
//        } else if (ctrl && tecla==80) {
//            alert("Impossível IMPRIMIR !");
//            return false;
////        } else if (ctrl && tecla==86) {
////            alert("Impossível COLAR !");
////            return false;
//        } else if (ctrl && tecla==88) {
//            alert("Impossível RECORTAR !"); 
//            return false;
//        } else {
//            return true;
//        }
//    }
//    
//    document.onkeydown = kdown;