How can I get or extract some string part from url jquery code example

Example 1: How can I get or extract some string part from url jquery

var citySearch = $.cookie('recentSearch');
citySearch.match(/_keywords=(.+)/)[1]

Example 2: How can I get or extract some string part from url jquery

var citySearch = $.cookie('recentSearch');
citySearch.match(/_keywords=(.+?)&/)[1]