add doc v1.1.2

doc/webhelp/template/js/custom.js

@@ -0,0 +1,22 @@
+var executed = false;
+$( document ).ready(function() {
+    $("#searchForm").on("submit", (e) => {
+        // WebHelps triggers the submit event handler multiple times.
+        if(!executed) { // We make sure that we execute it only one time.
+            e.stopPropagation(); 
+            var userQuery = $('#textToSearch').val();
+            if (userQuery.trim() === '') {
+                e.preventDefault();
+                return false;
+            }
+            
+            if (!/^[a-zA-Z]+$/.test(userQuery)) {
+                userQuery = userQuery.replace(/[\u4e00-\u9fa5]{2}/g, '$& '); // if the input isn't english characters, split every given Chinese input (string) by separating every two Chinese chars by spaces. 
+              }
+            // userQuery = userQuery.replace(/[\u4e00-\u9fa5]{2}/g, '$& '); // split every given Chinese input by separating every two Chinese characters by spaces.
+            //userQuery = userQuery.replace(/[\u4e00-\u9fa5]/g, '$& ');  // split every given Chinese input by separating every Chinese character by spaces.
+            $('#textToSearch').val(userQuery);
+            executed = true;
+        }
+    });
+});