jquery get get the url parameter
Just use the first method, simple and easy to use directly into the name of the parameter you want to get, you can return the parameter values
function GetQueryString(name)
{
var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
var r = window.location.search.substr(1).match(reg);
if(r!=null)return unescape(r[2]); return null;
}
Reads as follows
JS method to obtain the address bar parameters (super easy)
Method One: Using regular expressions to obtain the address bar parameters :( highly recommended, both practical and convenient)!
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Here is an example:
If the address bar URL is: abc.html id = 123 & url = http:? //Www.maidq.com
Well, but you use the above method to call: alert (GetQueryString ( "url"));
A dialog box will pop up: content is http://www.maidq.com
If you use: alert (GetQueryString ( "id")); then the pop-up content is 123 friends;
Of course, if you do not pass argument, such as your address is no argument abc.html back, that forced output the result of calling sometimes will complain:
So we have to add a judgment as to our request parameter is empty, first assign a value to a variable:
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So as not being given!
Method two: the traditional method
<Script of the type = "text / JavaScript">
function UrlSearch ()
{
var name, value;
var str = location.href; // get the entire address bar
( "?") NUM = str.indexOf var
str = str.substr ( num + 1); // obtain all the parameters of stringvar .substr ( Start [, length ]
var arr=str.split("&"); //各个参数放到数组里
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(); //实例化
alert(Request.id);
</script>
For example, this code is saved as 1.html
So I want to visit 1.html? Id = test
This time he took to the value of the test
在html里调用
<script type="text/javascript">
var a="http://baidu.com";
</script>
</head>
<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 a.indexOf S = ( "?");
var a.substring T = (S + 1);? // t is behind things
</ script>
stringvar.substr(start [, length ]
Returns a specified length of the substring starting at the specified location.
stringvar
required. A string literal or String object you want to extract the substring.
start
required. Substring starting position required. The index of the first character in the string is 0.
length
Optional. In return the number of characters in the substring to be included.
If the length is zero or negative, it returns an empty string. If this parameter is not specified, the string continues to the end of stringvar.
Here are some relevant parameters:
str.toLowerCase () is converted into lowercase
str.toUpperCase () String all converted to uppercase
That URL: Uniform Resource Locator (Uniform Resource Locator, URL)
the full URL consists of these parts:
scheme: // Host: Port / path # Query the fragment?
Scheme: communication protocol
commonly used http, ftp, maito etc.
host: host
server (computer) domain name system (DNS) host name or IP address.
port: Port number
integer, alternatively, be omitted when using the default port scheme, such as http default port 80.
path: the path
consists of zero or more "/" symbol string spaced, generally used to indicate a file or directory on the host address.
query: Query
Alternatively, for a dynamic web page (e.g., using technology to produce CGI, ISAPI, PHP / JSP / ASP / ASP.NET pages, etc.) to pass parameters, there may be multiple parameters, with the "&" symbol spaced, name and value of each parameter is separated by "=" symbol.
fragment: pieces of information
string that specifies the network resource in pieces. A plurality of pages, for example, noun, targeting fragment can be used directly to a noun. (Also known as the anchor.)
For such a URL
http://www.maidq.com/index.html?ver=1.0&id=6#imhere
We can get the various parts which use JavaScript
1, window.location.href
entire URl string (in the browser address bar is full)
This example returns the value: http://www.maidq.com/index.html? ver = 1.0 & id = 6 # imhere
2, window.location.protocol
protocol portion of the URL
to the present embodiment Return Value: http:
3, window.location.host
the host portion of URL
according to the present embodiment Return Value: www.maidq.com
4, window.location.port
the URL of part of the port
if the default port 80 (update: Even added: 80), the return value is not the default of 80 characters but empty
in this case the return value: ""
5, window.location.pathname
path portion of the URL (that is, the file address)
of the present Example Return Value: /fisker/post/0703/window.location.html
6, window.location.search
query (parameters) section
in addition to the dynamic language assignment outside, we can also give a static page and use javascript to get the parameter value should believe
in this case the return value:? Ver = 1.0 & id = 6
7, window.location.hash
anchor
according to the present embodiment Return Value: #imhere
