diff -uNrp didiwiki.orig/src/wiki.c didiwiki/src/wiki.c
--- didiwiki.orig/src/wiki.c	2004-09-03 10:11:42.000000000 +0800
+++ didiwiki/src/wiki.c	2004-09-03 10:12:59.000000000 +0800
@@ -601,6 +601,30 @@
 }
 
 void
+wiki_show_preview_page(HttpResponse *res, char *wikitext, char *page)
+{
+  char *html_clean_wikitext = NULL;
+
+  http_response_printf_alloc_buffer(res, strlen(wikitext)*2);
+
+  wiki_show_header(res, "Preview", TRUE);
+
+  html_clean_wikitext = util_htmlize(wikitext, strlen(wikitext));
+
+  wiki_print_data_as_html(res, html_clean_wikitext);      
+
+  http_response_printf(res, "<hr/>\n");
+  http_response_printf(res, EDITFORM, page, wikitext);
+  
+  wiki_show_footer(res);  
+
+  http_response_send(res);
+
+  exit(0);
+
+}
+
+void
 wiki_show_edit_page(HttpResponse *res, char *wikitext, char *page)
 {
   wiki_show_header(res, page, FALSE);
@@ -839,7 +863,10 @@
       /* TODO: dont blindly write wikitext data to disk */
       if ( (wikitext = http_request_param_get(req, "wikitext")) != NULL)
 	{
-	  file_write(page, wikitext);	      
+		if (http_request_param_get(req, "Save") != NULL)
+			file_write(page, wikitext);	      
+		else if (http_request_param_get(req, "Preview") != NULL)
+			wiki_show_preview_page(res, wikitext, page);
 	}
 
       if (access(page, R_OK) == 0) 	/* page exists */
--- didiwiki.orig/src/wikitext.h	2004-08-17 16:28:48.000000000 +0800
+++ didiwiki/src/wikitext.h	2004-09-03 10:12:59.000000000 +0800
@@ -54,8 +24,8 @@
 #define EDITFORM                                                         \
                                                                          \
 "<form method=POST action='%s'>\n"                                       \
-"<textarea name='wikitext' rows='20' cols='80' wrap='virtual'>%s</textarea>\n" \
-"<p><input type='submit' value='Save' title='[alt-k]' accesskey='k'></p>\n"                            \
+"<div style='margin:1em;'><textarea name='wikitext' rows='20' cols='80' wrap='virtual'>%s</textarea></div>\n" \
+"<p><input type='submit' value='Preview' title='[alt-p]' name='Preview' accesskey='p'/><input type='submit' value='Save' title='[alt-k]' name='Save' accesskey='k'/></p>\n"                            \
 "</form>\n"