JavaScript gets URL address parameter implementation method

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<script type= "Text/javascript" > <!-- Description: Javascript gets the link (URL) parameter method Finishing: Http://www.111cn.net function getquerystring (name) { If the link has no parameters, or the link does not exist in the argument we want to get, return directly to the null if (Location.href.indexOf ("?") ==-1 | | Location.href.indexOf (name+ ' = ') ==-1) { Return "; } Get the Parameters section of a link var querystring = location.href.substring (Location.href.indexOf ("?") +1); Detach parameter pair? key=value&key2=value2 var parameters = Querystring.split ("&"); var pos, paraname, Paravalue; for (var i=0; i<parameters.length; i++) { Get the equals sign position pos = parameters[i].indexof (' = '); if (pos = = 1) {Continue} Get name and value Paraname = parameters[i].substring (0, POS); Paravalue = parameters[i].substring (pos + 1); If the name of the query is equal to the current name, the current value is returned, and the + number in the link is restored to a space if (paraname = = name) { Return unescape (Paravalue.replace (/+/g, "")); } } Return "; }; Http://localhost/test.html?aa=bb&test=cc+dd&ee=ff Alert (getquerystring (' Test ')); --> </script>