Sharepoint

function GetHttpParameter( paramName )
        {
            paramName = paramName.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
            var regexS = "[\\?&]"+paramName+"=([^&#]*)";
            var regex = new RegExp( regexS );
            var results = regex.exec( window.location.href ); // or: regex.exec( unescape( window.location.href ) ) when needed...
            if( results == null )
                return "";
            else
                return results[1];
        }
 

(Original idea: http://www.netlobo.com/url_query_string_javascript.html ... Thank You!)