function getqs(fi) { // optionally pass a querystring to parse
	var qs = location.search.substring(1, location.search.length);
	if (qs.length == 0) return;

// Turn <plus> back to <space>
// See: http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4.1
	qs = qs.replace(/\+/g, ' ');
	var args = qs.split('&'); // parse out name/value pairs separated via &
	
// split out each name=value pair
	for (var i = 0; i < args.length; i++) {
		var pair = args[i].split('=');
		var name = decodeURIComponent(pair[0]);
		
		if (fi==name){
		    var value = (pair.length==2)
			    ? decodeURIComponent(pair[1])
			    : name;
		
		    return value;
		}
	}
	return null;
}