Added a button to swap the current to/from selection

index.html

@@ -33,6 +33,7 @@ <h2>Thaumcraft 4.x-5.x Research Helper</h2>
 		</tr>
 		<tr><td>From:</td><td><input type=hidden id="fromSel"></input></td></tr>
 		<tr><td>To:</td><td><input type=hidden id="toSel"></input></td></tr>
+		<tr><td><input id="swap_selections" type="button" value="Swap"/></td></tr>
 		<tr><td>Min. Steps:</td><td><input id="spinner" name="value" value="1" style="width:140px" /></td></tr>
 		<tr><td></td><td><input id="find_connection" type="button" value="Find Connection" /><input id="close_results" type="button" value="Close all results" /></td></tr>
 		<tr><td>Addons:</td><td id="addons"></td></tr> 

tcresearch.js

@@ -84,7 +84,6 @@ $(function(){
 		option.textContent = text;
 		return option;
 	}
-
 	function formatAspectName(string)
 	{
 		//http://stackoverflow.com/a/1026087 Capitalize the first letter of string in JavaScript
@@ -99,6 +98,12 @@ $(function(){
 		max: 10
 	});
 	reset_aspects();
+	$('#swap_selections').click(function(){
+		var fromSel = $('#fromSel').select2("val");
+		var toSel = $('#toSel').select2("val");
+		$('#fromSel').select2('val', toSel);
+		$('#toSel').select2('val', fromSel);
+	});
 	$("#find_connection").click(function(){
 		run();
 	});