ADD file via upload

static/js/index.js

@@ -0,0 +1,11 @@
+function begin(){
+    var xhr = new XMLHttpRequest();
+    xhr.open('get','/begin?begin=1');
+    xhr.onload = function (){
+        var response = xhr.responseText;
+        console.log(response);
+         var json_data = eval('('+response+')');
+         console.log(json_data);
+    }
+    xhr.send(null);
+}