Simplify date match regex a little ...

assets/js/sections/qso.js

@@ -474,7 +474,7 @@ $('#start_time').change(function() {
 /* date input shortcut */
 $('#start_date').change(function() {
 	 raw_date = $(this).val();
-	if(raw_date.match(/^[12]\d\d\d[01]\d[0123]\d$/)) {
+	if(raw_date.match(/^[12]\d{3}[01]\d[0123]\d$/)) {
 		raw_date = raw_date.substring(0,4)+"-"+raw_date.substring(4,6)+"-"+raw_date.substring(6,8);
 		$('#start_date').val(raw_date);
 	}