Update and rename Allow positive and decimal values.js to Allow positive and decimal values.js

Moved the file to the Regex folder.

Refactored the code:
- use clearValue instead of setValue ''.
- fieldName to make it easier to adjust and use.
- Include comment to describe the Regex

Author: WillemZeiler

Client-Side Components/Client Scripts/Allow positive and decimal values/Allow positive and decimal values.js

@@ -0,0 +1,25 @@
+function onChange(control, oldValue, newValue, isLoading) {
+    if (isLoading || newValue == '') {
+        return;
+    }
+
+    // Regex: allows positive integers or decimals with up to two decimal places
+    var regex = /^[0-9]+(\.\d{1,2})?$/;
+
+    // Regex explanation:
+    // ^               : Start of string
+    // [0-9]+          : One or more digits (whole number part)
+    // (\.\d{1,2})?    : Optional decimal part
+    //   \.            : Literal decimal point
+    //   \d{1,2}       : One or two digits after the decimal
+    // $               : End of string
+    // This pattern matches positive integers or decimals with up to two decimal places
+
+    // Replace 'amount' with the actual field name this script is attached to
+    var fieldName = "amount";
+
+    if (!regex.test(newValue) || newValue <= 0) {
+        g_form.clearValue(fieldName);
+        g_form.showFieldMsg(fieldName, 'Please enter a value greater than zero. Decimals are allowed (up to two places).', 'error');
+    }
+}