Avoid the use of js.global, remove added load paths on exit.

exec/dorkit/graphic.js

@@ -16,7 +16,7 @@
  *
  */
 
-if (js.global.Attribute === undefined)
+if (typeof(Attribute) === 'undefined')
 	load("attribute.js");
 
 function Graphic(w,h,attr,ch)

exec/dorkit/jsexec_input.js

 js.load_path_list.unshift(js.exec_dir+"dorkit/");
-if (js.global.system !== undefined)
+if (typeof(system) !== 'undefined')
 	js.load_path_list.unshift(system.exec_dir+"dorkit/");
 load('ansi_input.js');
 var k;

exec/dorkit/local_console.js

@@ -2,7 +2,7 @@
  * Implements the local console using conio
  */
 
-if (js.global.Graphic === undefined)
+if (typeof(Graphic) === 'undefined')
 	load("graphic.js");
 
 dk.console.local_io = {

exec/dorkit/sbbs_console.js

 load("sbbsdefs.js");
-js.global.dk_old_ctrlkey_passthru = console.ctrlkey_passthru;
-js.global.dk_old_pauseoff = bbs.sys_status & SS_PAUSEOFF;
-js.on_exit("console.ctrlkey_passthru=js.global.dk_old_ctrlkey_passthru;bbs.sys_status=(bbs.sys_status &~ SS_PAUSEOFF)|js.global.dk_old_pauseoff");
+dk_old_ctrlkey_passthru = console.ctrlkey_passthru;
+dk_old_pauseoff = bbs.sys_status & SS_PAUSEOFF;
+js.on_exit("console.ctrlkey_passthru=dk_old_ctrlkey_passthru;bbs.sys_status=(bbs.sys_status &~ SS_PAUSEOFF)|dk_old_pauseoff");
 console.ctrlkey_passthru=0x7fffffff;	// Disable all parsing.
 
 /*

exec/dorkit/sbbs_input.js

 js.load_path_list.unshift(js.exec_dir+"dorkit/");
-if (js.global.system !== undefined)
+if (typeof(system) !== 'undefined')
 	js.load_path_list.unshift(system.exec_dir+"dorkit/");
 load('ansi_input.js');
 var q = new Queue("dorkit_input");

exec/dorkit/screen.js

@@ -7,9 +7,9 @@
  * all data should be provided using the print() method.
  */
 
-if (js.global.Graphic === undefined)
+if (typeof(Graphic) === 'undefined')
 	load("graphic.js");
-if (js.global.Attribute === undefined)
+if (typeof(Attribute) === 'undefined')
 	load("attribute.js");
 
 function Screen(w, h, attr, fill)

exec/dorkit/socket_input.js

 js.load_path_list.unshift(js.exec_dir+"dorkit/");
-if (js.global.system !== undefined)
+if (typeof(system) !== 'undefined')
 	js.load_path_list.unshift(system.exec_dir+"dorkit/");
 load('ansi_input.js');
 var i;

exec/load/dorkit.js

 js.load_path_list.unshift(js.exec_dir+"dorkit/");
-if (js.global.system !== undefined)
+js.on_exit("js.load_path_list.shift()");
+if (typeof(system) !== 'undefined') {
 	js.load_path_list.unshift(system.exec_dir+"dorkit/");
+	js.on_exit("js.load_path_list.shift()");
+}
 load("screen.js");
 
 // polyfill the String object with repeat method.
@@ -716,13 +719,13 @@ var dk = {
 		gen_dir:undefined,
 		sysop_name:undefined,
 		default_attr:new Attribute(7),
-		mode:(js.global.bbs !== undefined
-				&& js.global.server !== undefined
-				&& js.global.client !== undefined
-				&& js.global.user !== undefined
-				&& js.global.console !== undefined) ? 'sbbs'
-				: (js.global.jsexec_revision !== undefined ? 'jsexec'
-					: (js.global.jsdoor_revision !== undefined ? 'jsdoor' : undefined))
+		mode:(typeof(bbs) !== 'undefined'
+				&& typeof(server) !== 'undefined'
+				&& typeof(client) !== 'undefined'
+				&& typeof(user) !== 'undefined'
+				&& typeof(console) !== 'undefined') ? 'sbbs'
+				: (typeof(jsexec_revision) !== 'undefined' ? 'jsexec'
+					: (typeof(jsdoor_revision) !== 'undefined' ? 'jsdoor' : undefined))
 	},
 	misc:{
 		event_time:undefined,