JS监听页面----无鼠标键盘动作，自动跳页

监听页面鼠标键盘动作，若用户5秒没有任何操作，页面自动跳转

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();     
	}