Why is Window.location.search empty?

1, what is window.location? Example

Url:http://b.a.com:88/index.php?name=kang&when=2011#first

Properties	meaning	value
Protocol	Agreement	"http:"
Hostname	The name of the server	"B.a.com"
Port	Port	"88"
Pathname	The part of the URL that is behind the host name	"/index.php"
Search	"?" The later part, also called the query string	"? name=kang&when=2011"
Hash	Returns the content after "#"	"#first"
Host	equals hostname + Port	"B.a.com:88"
Href:	The full URL of the current page	"Http://www.a.com:88/index.php?name=kang&when=2011#first"

Window.location and document.location are mutually equivalent and can be exchanged for use

The 8 properties of the location are both readable and writable, but only the href and hash write make sense. For example, changing the location.href will relocate to a URL, while modifying Location.hash will jump to the anchor (<a id= "name" > or <div id= "id" > etc.) name tag (if any) in the current page ), and the page will not be reloaded

Attention
url:http://b.a.com:88/index.php?name=kang&how= #when =2011#first

Search: "? name=kang&how=" First "?" After the hash: "#when =2011#first" after the first "#" content 2, why is window.location.search empty? A : Note the difference between the search and hash above, if the url "? "Before there was a" # "for example:"http://localhost:63342/index.html#/version? " type=35&id=5"Then use Window.location.search to get Empty (" "). Because "? type=35&id=5"string character is belong to"#/version? Type=35&id=5"This string of characters, that is, query string search can only be taken to"? "After and" # "before the content, if" # "before"? " "Search value is empty. 3, Application

1 //Get URL parameters2 functiongetquerystring (name)3 {4     varafter = Window.location.hash.split ("?") [1];5     if(after)6     {7         varReg =NewRegExp ("(^|&)" + name + "= ([^&]*) (&|$)");8         varR =After.match (reg);9         if(r! =NULL)Ten         { One             returndecodeURIComponent (r[2]); A         } -         Else -         { the             return NULL; -         } -     } -}

Why is Window.location.search empty?