直接放代码了,添加到JS文件里面就行了

function click(e) {
                if (document.all) {
                    if (event.button==2||event.button==3) {
                        alert("欢迎光临寒舍,有什么需要帮忙的话,请与站长联系!谢谢您的合作!!!");
                        oncontextmenu='return false';
                    }
                }
                if (document.layers) {
                    if (e.which == 3) {
                        oncontextmenu='return false';
                    }
                }
            }
             
            if (document.layers) {
                document.captureEvents(Event.MOUSEDOWN);
            }
            document.onmousedown=click;
            document.oncontextmenu = new Function("return false;")
 
            document.onkeydown =document.onkeyup = document.onkeypress=function(){
                if(window.event.keyCode == 123) {
                    window.event.returnValue=false;
                    return(false);
                }
            }