Use regular expressions and document. Location. Search to obtain the URL parameter value

To get the parameters of the current page url, you may first think of using window. Location. href or document. Location. href to get results such as http://www.xxx.com /? AA = XX & BB = xx; but what we need is :? AA = XX & BB = xx. In this form, you can use the document. Location. Search attribute.

What if I want to obtain the value of AA after the URL? The common method may be as follows:

    Function  (PARAM ){
  VaR  URL  =  Window. Location. tostring ();
URL  =  URL. Split (  '  ?  ' );
  If  (  Typeof  (URL [  1  ])  =     '  String  '  ){
URL  =  URL [  1  ]. Split ( '  &  '  );
  For  (I  =     0  ; I  <  URL. length; I  ++  )
{
S  =  URL [I]. Split (  " =  "  );
  If  (S [  0  ]  =     "  Param  "  )  Return  S [  1  ];
}
}
  Return    Null  ;
} 

Use document. Location. Search and regular expression to obtain parameters.CodeMore concise:

 Function  Getparameter (sprop)
{
  VaR  Re  =     New  Regexp (sprop  +     "  = ([^ \ &] *) "  ,  "  I  "  );
  VaR  A  =  Re. Exec (document. Location. Search );
  If  (  =     Null  )
  Return    Null  ;
  Return  A [  1  ];
};