How does js obtain request Parameters in a request?

<Script type = "text/javascript">
 
Document. write (location. search );
 
</Script>

You can obtain the request parameters.
Let's say our request is such a http://www.example.com/submit.htm? Email = someone@example.com

The request result should look like this:
? Email = someone@example.com

Write a function as follows:

[Html]
Function getUrlParam (name ){
Var reg = new RegExp ("(^ | &)" + name + "= ([^ &] *) (& | $ )");
Var r = window. location. search. substr (1). match (reg );
If (r! = Null)
Return unescape (r [2]);
Return null;
}

In this way, we can get the specified parameter ~~~~

 

From zipu888