diff -r ac33ab13d1d0 config.def.h
--- a/config.def.h	Tue Jan 17 13:58:04 2012 +0100
+++ b/config.def.h	Tue Jan 31 23:18:53 2012 +0000
@@ -4,6 +4,7 @@
 static char *progress_untrust = "#FF6600";
 static char *progress_trust = "#00FF00";
 static char *stylefile      = ".surf/style.css";
+static char *altstylefile   = ".surf/altstyle.css";
 static char *scriptfile     = ".surf/script.js";
 static char *cookiefile     = ".surf/cookies.txt";
 static time_t sessiontime   = 3600;
@@ -36,6 +37,7 @@
     { MODKEY,               GDK_h,      navigate,   { .i = -1 } },
     { MODKEY,               GDK_j,      scroll,     { .i = +1 } },
     { MODKEY,               GDK_k,      scroll,     { .i = -1 } },
+    { MODKEY,               GDK_s,      togglestyle,{ 0 } },
     { 0,                    GDK_Escape, stop,       { 0 } },
     { MODKEY,               GDK_o,      source,     { 0 } },
     { MODKEY,               GDK_g,      spawn,      SETPROP("_SURF_URI", "_SURF_GO") },
diff -r ac33ab13d1d0 surf.1
--- a/surf.1	Tue Jan 17 13:58:04 2012 +0100
+++ b/surf.1	Tue Jan 31 23:18:53 2012 +0000
@@ -89,6 +89,9 @@
 .TP
 .B Ctrl\-o
 show the sourcecode of the current page.
+.TP
+.B Ctrl\-s
+Toggles the user stylesheet.
 .SH SEE ALSO
 .BR dmenu(1),
 .BR xprop(1),
diff -r ac33ab13d1d0 surf.c
--- a/surf.c	Tue Jan 17 13:58:04 2012 +0100
+++ b/surf.c	Tue Jan 31 23:18:53 2012 +0000
@@ -97,6 +97,7 @@
 static void reload(Client *c, const Arg *arg);
 static void resize(GtkWidget *w, GtkAllocation *a, Client *c);
 static void scroll(Client *c, const Arg *arg);
+static void togglestyle(Client *c, const Arg *arg);
 static void setatom(Client *c, int a, const char *v);
 static void setcookie(SoupCookie *c);
 static void setup(void);
@@ -669,6 +670,26 @@
 }
 
 void
+togglestyle(Client *c, const Arg *arg) {
+	WebKitWebSettings *settings;
+	gchar *styleuri, *altstyleuri, *cururi;
+
+	styleuri = g_strconcat("file://", buildpath(stylefile), NULL);
+	altstyleuri = g_strconcat("file://", buildpath(altstylefile), NULL);
+
+	settings = webkit_web_view_get_settings(c->view);
+	g_object_get(G_OBJECT(settings), "user-stylesheet-uri", &cururi, NULL);
+	if(strcmp(cururi,styleuri) == 0)
+		g_object_set(G_OBJECT(settings), "user-stylesheet-uri", altstyleuri, NULL);
+	else
+		g_object_set(G_OBJECT(settings), "user-stylesheet-uri", styleuri, NULL);
+
+	g_free(styleuri);
+	g_free(altstyleuri);
+	g_free(cururi);
+}
+
+void
 setcookie(SoupCookie *c) {
 	int lock;