浏览器操作

window.onblur=function () {

    };
    document.onkeydown=function () {
        return true
    };
    document.body.oncopy =function () {
        return true
    };
    document.body.oncopy=function () {
        return true
    };
    document.body.onselect=function () {
        return true
    };
    document.body.oncontextmenu =function () {
        return true
    };

    //解除切屏限制
    window.onblur=null
    window.onblur=function () {
        console.debug(1);
    };

    //解除快捷键切屏操作
    window.onkeyup=window.onkeydown=window.onkeypress=document.onkeyup=document.onkeydown=document.onkeypress
    document.body.onkeyup=document.body.onkeydown=document.body.onkeypress=onkeyup=null;

    //解除复制粘贴限制
    window.oncopy=window.onpaste=document.oncopy=document.onpaste=document.body.oncopy=document.body.onpaste=
        oncopy=onpaste=null;