javascriptの深いwindow、screen、navigatorの対象

a)           ：
1>                        ，              。
2>         web         ，              。
3>          HTML      ，              。    


      ：
var getWinPosition = function(){
	var pos={
		//window.screenX=>FF
		left:(typeof window.screenLeft === 'number')? window.screenLeft: window.screenX;
		top :(typeof window.screenTop  === "number")? window.screenTop : window.screenY;
	};
	return pos;
}
        ：
var getViewPortSize = function(){
	var w = window.innerWidth,
		h = widnow.innerHeight;
	if(typeof w !== "number"){//IE
		if(document.compatMode == "CSS1Compat"){//    
			w = document.documentElement.clientWidth;
			h = document.documentElement.clientHeight;
		}else{//     IE6    
			w = document.body.clientWidth;
			h = document.body.clientHeight;
		}
	}
	return {
		width :w,
		height:h
	}
}

b)screen                  
                               
availHeight              （      ） 
availWidth               （      ） 
bufferDepth                           
colorDepth                                
deviceXDPI                                  
deviceYDPI                                  
fontSmoothingEnabled                            
height                          
logicalXDPI                            
logicalYDPI                            
updateInterval                    
width                           

    (     )  ：
var getScreenSize = function (){
	var w = screen.availWidth,
		h = screen.availHeight;
	return {
		width :w,
		height:h
	}
}

c)Navigator            
var getBrowserMessage = function (){
	var nav = navigator;
	return  "appName:"    +nav.appName    +"
"+//        
			"appCodeName:"+nav.appCodeName+"
"+//       
			"appVersion:" +nav.appVersion +"
"+//       
			"userAgent:"  +nav.userAgent  +"
"+//    user-agent HTTP         
			"platform:"   +nav.platform        ;//          
}

//FF
appName:Netscape
appCodeName:Mozilla
appVersion:5.0 (Windows)
userAgent:Mozilla/5.0 (Windows NT 5.1; rv:21.0) Gecko/20100101 Firefox/21.0
platform:Win32

var pattern = /(mozilla)(?:.*? rv:([\w.]+)|)/;
//IE6.0
appName:Microsoft Internet Explorer 
appCodeName:Mozilla 
appVersion:4.0 (compatible; MSIE 6.0; Windows NT 5.1; InfoPath.2; .NET4.0C) 
userAgent:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; InfoPath.2; .NET4.0C) 
platform:Win32 

var pattern = /(msie) ([\w.]+)/;
//chorme
appName:Netscape 
appCodeName:Mozilla 
appVersion:5.0 (Windows NT 5.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97 Safari/537.11 
userAgent:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97 Safari/537.11 
platform:Win32

var pattern = /(chrome)[ \/]([\w.]+)/;
//opera
appName:Opera 
appCodeName:Mozilla 
appVersion:9.80 (Windows NT 5.1; U; zh-cn) 
userAgent:Opera/9.80 (Windows NT 5.1; U; zh-cn) Presto/2.10.289 Version/12.02 
platform:Win32

var pattern = /(opera)(?:.*version|)[ \/]([\w.]+)/;
//safari
appName:Netscape 
appCodeName:Mozilla 
appVersion:5.0 (Windows NT 5.1) AppleWebKit/534.54.16 (KHTML, like Gecko) Version/5.1.4 Safari/534.54.16 
userAgent:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/534.54.16 (KHTML, like Gecko) Version/5.1.4 Safari/534.54.16 
platform:Win32

var pattern = /(webkit)[ \/]([\w.]+)/;

         ：
var getBrowser = function( ua ) {
	ua = ua.toLowerCase();
	var match = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
		/(webkit)[ \/]([\w.]+)/.exec( ua ) ||
		/(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
		/(msie) ([\w.]+)/.exec( ua ) ||
		ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
		[];

	return {
		browser: match[ 1 ] || "",
		version: match[ 2 ] || "0"
	};
};
var nav=getBrowser(navigator.userAgent);
alert(nav.browser+"----"+nav.version);

d)     
window.location.hash="#top";
or
window.location.replace("#top");