Improve *_hash_arguments methods

js/base.php

@@ -256,6 +256,8 @@ function del_hash_argument(key, fireevent) {
 	var hash = window.location.hash;
 	hash = hash.replace(new RegExp(';?'+key+'=[^;]+'),'');
 	hash = hash.replace('/;','/');
+	if (hash.charAt(hash.length-1) === '/')
+		hash = hash.substr(0, hash.length-1);
 	window.location.hash = hash;
 }
 
@@ -268,6 +270,10 @@ function set_hash_argument(key, val, fireevent) {
 	else window.hash_argument_nofirechange = true;
 
 	var hargs = get_hash_arguments();
+	if (Object.keys(hargs).length === 0) {
+		window.location.hash += '/'+key+'='+val;
+		return;
+	}
 	if (hargs[key] === undefined) {
 		window.location.hash += ';'+key+'='+val;
 		return;