1 files changed, 7 insertions, 2 deletions
diff --git a/src/editor/simple/cloud.js b/src/editor/simple/cloud.js
index cd2b9a442..fad66e1ff 100644
--- a/src/editor/simple/cloud.js
+++ b/src/editor/simple/cloud.js
@@ -136,6 +136,11 @@ function gfshell(cmd,cont) {
 
 // Check the syntax of an expression
 function check_exp(s,cont) {
-    // Not implemented yet!!
-    cont(null)
+    function check(gf_message) {
+	debug("cc "+s+" = "+gf_message);
+	cont(/parse error/.test(gf_message) ? "parse error" : null);
+    }
+    if(navigator.onLine)
+	ajax_http_get("upload.cgi?cc="+encodeURIComponent(s),check)
+    else cont(null)
 }