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Method One: Use regular expressions to get the address bar parameters: (highly recommended, both practical and convenient!) ）
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Here's an example:
If the Address bar URL is: abc.html?id=123&url=http://www.maidq.com
So, but you use the above method to invoke: Alert (getquerystring ("url"));
A dialog box pops up: the content is http://www.maidq.com
If using: Alert (getquerystring ("id")), then the popup content is 123;
Of course, if you do not pass parameters, such as your address is abc.html back no parameters, the force output call results sometimes error:
So we have to add a judgment to determine if the argument we requested is empty, first assign the value to a variable:
varmyurl=GetQueryString("url");if(myurl !=null&& myurl.toString().length>1){ alert(GetQueryString("url"));} |
This will not be an error!
Method Two: Traditional methods
<script type= "Text/javascript" >
function Urlsearch ()
{
var Name,value;
var str=location.href; Get the entire address bar
var num=str.indexof ("?")
Str=str.substr (num+1); Get all Parameters Stringvar. substr (start [, length ]
var arr=str.split ("&"); Each parameter is placed in the array
for (Var i=0;i < arr.length;i++) {
Num=arr[i].indexof ("=");
if (num>0) {
Name=arr[i].substring (0,num);
Value=arr[i].substr (num+1);
This[name]=value;
}
}
}
var request=new urlsearch (); Instantiation of
alert (request.id);
</script>
For example, save this code as 1.html.
So I'm going to visit 1.html?id=test
At this point, I'm going to take the value of test.
called in HTML.
<script type= "Text/javascript" >
var a= "http://baidu.com";
</script>
<body>
<a id= "A1" href= "" >sadfsdfas</a>
<script>
var A1=document.getelementbyid ("A1");
A1.href=a;
</script>
<script type= "Text/javascript" >
var a= "HTTP://XXX.COM/GG.HTM?CCTV";
var s=a.indexof ("?");
var t=a.substring (s+1);//T is the thing behind it.
</script>
Stringvar.substr (start [, length ]
Returns a substring of the specified length starting at the specified position.
Stringvar
Required option. The string literal or string object to extract the substring from.
Start
Required option. The starting position of the desired substring. The index of the first character in the string is 0.
Length
Options are available. The number of characters that should be included in the returned substring.
If length is 0 or negative, an empty string is returned. If this argument is not specified, the substring continues to the end of the stringvar.
Some related parameters are listed below:
Str.tolowercase () Convert to lowercase
Str.touppercase () string all converted to uppercase
URL: Uniform Resource Locator (Uniform Resource Locator, URL)
The complete URL consists of the following parts:
Scheme://host:port/path?query#fragment
Scheme: Communication protocol
Common Http,ftp,maito, etc.
Host: Hosts
The server (computer) domain Name System (DNS) hostname or IP address.
Port: Port number
An integer, optionally, that omits the default port for using the scenario, such as HTTP, with the default port of 80.
Path: Paths
A string separated by 0 or more "/" symbols, typically used to represent a directory or file address on a host.
Query: Querying
Optional, for use with dynamic Web pages such as CGI, ISAPI, php/jsp/asp/asp. NET and other technical Web pages) pass parameters, can have multiple parameters, separated by the "&" symbol, the name and value of each parameter is separated by the "=" symbol.
Fragment: Pieces of information
String that specifies the fragment in the network resource. For example, there are multiple noun interpretations in a Web page, and you can use fragment to navigate directly to a noun interpretation. (also known as anchor points.)
For such a URL
Http://www.maidq.com/index.html?ver=1.0&id=6#imhere
We can use JavaScript to get every part of it.
1, Window.location.href
The entire URL string (in the browser is the full address bar)
This example returns the value: Http://www.maidq.com/index.html?ver=1.0&id=6#imhere
2,window.location.protocol
The protocol portion of the URL
This example returns the value: http:
3,window.location.host
The host part of the URL
This example returns the value: Www.maidq.com
4,window.location.port
The port portion of the URL
If you are using the default 80 port (update: Even if you added: 80), the return value is not the default of 80 but the null character
This example returns the value: ""
5,window.location.pathname
The path portion of the URL (that is, the file address)
This example returns the value:/fisker/post/0703/window.location.html
6,window.location.search
Query (Parameters) Section
In addition to assigning values to dynamic languages, we can also give static pages and use JavaScript to get the values of the arguments we believe in.
This example returns the value:? ver=1.0&id=6
7,window.location.hash
Anchor Point
This example returns the value: #imhere
Turn from
JS gets the parameters in the URL;
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