apply dropdown style

misc/plugin/category.rb

@@ -616,8 +616,9 @@ def initial_replace_sections(diary)
 if @conf['category.edit_support'] then
 	add_header_proc do
 		%Q[\t<script type="text/javascript"><!--
-		function inj_c(str) {
+		function inj_c() {
 			var textarea = window.document.forms[0].body;
+			var str = '[' + window.document.getElementById('category_dropdown').value + ']';
 			textarea.focus();
 			if (document.selection) { // IE, Opera
 				var range = document.selection.createRange();
@@ -640,10 +641,12 @@ def initial_replace_sections(diary)
 		unless @categories.size == 0 then
 			ret << '<div class="field title">'
 			ret << "#{@category_conf_label}:\n"
+			ret << '<form name="dropdown">'
+			ret << '<select id="category_dropdown" onChange="inj_c()">'
 			@categories.sort_by{|e| e.downcase}.each do |c|
-				ret << %Q!| <a href="javascript:inj_c(&quot;[#{h c}]&quot;)">#{h c}</a>\n!
+				ret << %Q!<option value="#{h c}">#{h c}</option>!
 			end
-			ret << "|\n</div>\n<br>\n"
+			ret << "\n</select></form>\n</div>\n<br>\n"
 		end
 	end
 end