JS监听页面----无鼠标键盘动作，自动跳页

function ScreenSaver(settings){     

        this.settings = settings;     

        this.nTimeout = this.settings.timeout;     

        document.body.screenSaver = this;
        // link in to body events
        document.body.onmousemove = ScreenSaver.prototype.onevent;
        document.body.onmousedown = ScreenSaver.prototype.onevent;
        document.body.onkeydown = ScreenSaver.prototype.onevent;
        document.body.onkeypress = ScreenSaver.prototype.onevent;     

        var pThis = this;
        var f = function(){pThis.timeout();}
        this.timerID = window.setTimeout(f, this.nTimeout);
    }
    ScreenSaver.prototype.timeout = function(){
        if ( !this.saver ){
            window.location = 'www.baidu.com';
        }
    }
    ScreenSaver.prototype.signal = function(){
        if ( this.saver ){
            this.saver.stop();
        }     

        window.clearTimeout(this.timerID);     

        var pThis = this;
        var f = function(){pThis.timeout();}
        this.timerID = window.setTimeout(f, this.nTimeout);
    }     

    ScreenSaver.prototype.onevent = function(e){
        this.screenSaver.signal();
    }     

    var saver;
    function initScreenSaver(){
        //blort;
        saver = new ScreenSaver({timeout:5000});   //无动作时间
    }
    window.onload = function(){
      initScreenSaver();
    }