Question

I am trying to match the string 6c81748b9239e96e it’s random each time. Using the following code below. My problem is that it matches the entire string and I only need the random string that contains the letters and numbers.

String

<a href="playgame.aspx?gid=4&tag=6c81748b9239e96e">Play</a>

javascript regex

string.match(/\&tag\=[A-Za-z0-9]+\"\>/i);

Answer 1

Here is my suggestion:

1. Add the snippet provided by @Artem Barger to your code: https://stackoverflow.com/a/901144/851498 You need to slightly modify it, though (adding the str argument):

   function getParameterByName( name, str )
   {
       name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
       var regexS = "[\\?&]" + name + "=([^&#]*)";
       var regex = new RegExp(regexS);
       var results = regex.exec( str );
       if(results == null)
           return "";
       else
         return decodeURIComponent(results[1].replace(/\+/g, " "));
   }
   

2. Use it this way:

   var str = getParameterByName( 'tag', string );
   

Jsfiddle demo: http://jsfiddle.net/Ralt/u9MAv/