Extract URL parameters via JavaScript

Just a short code snippet that allows the extraction of URL parameters via JavaScript:

function get_url_param( name )
{
name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
var regexS = "[\\?&]"+name+"=([^&#]*)";
var regex = new RegExp( regexS );
var results = regex.exec( window.location.href );

if ( results == null )
return "";
else
return results[1];
}