diff --git a/app/src/main/java/com/paulcoding/hviewer/js/JS.kt b/app/src/main/java/com/paulcoding/hviewer/js/JS.kt
index 2434c59..88f2a01 100644
--- a/app/src/main/java/com/paulcoding/hviewer/js/JS.kt
+++ b/app/src/main/java/com/paulcoding/hviewer/js/JS.kt
@@ -34,9 +34,7 @@ fun toJsonElement(jsObject: Any?, gson: Gson = Gson()): JsonElement {
     }
 }
 
-class JS(siteConfig: SiteConfig) {
-    private val fileName = siteConfig.scriptFile
-
+class JS(siteConfig: SiteConfig? = null) {
     var scope: ScriptableObject
     val gson = Gson()
 
@@ -51,19 +49,28 @@ class JS(siteConfig: SiteConfig) {
     init {
         val context = prepareContext()
         scope = context.initStandardObjects()
-        ScriptableObject.putProperty(scope, "baseUrl", Context.javaToJS(siteConfig.baseUrl, scope))
         ScriptableObject.putProperty(scope, "import", importFunction)
         ScriptableObject.putProperty(scope, "fetch", fetchFunction)
+        ScriptableObject.putProperty(scope, "xhr", xhrFunction)
         ScriptableObject.putProperty(scope, "atob", atobFunction)
         ScriptableObject.putProperty(scope, "console", NativeObject().apply {
             put("log", this, logFunction)
         })
 
         try {
-            val reader = FileReader(File(appContext.scriptsDir, fileName))
-            context.evaluateReader(scope, reader, fileName, 1, null)
-            Context.exit()
-            reader.close()
+            siteConfig?.let {
+                val fileName = it.scriptFile
+
+                ScriptableObject.putProperty(
+                    scope,
+                    "baseUrl",
+                    Context.javaToJS(it.baseUrl, scope)
+                )
+                val reader = FileReader(File(appContext.scriptsDir, fileName))
+                context.evaluateReader(scope, reader, fileName, 1, null)
+                Context.exit()
+                reader.close()
+            }
         } catch (e: Exception) {
             e.printStackTrace()
         }
diff --git a/app/src/main/java/com/paulcoding/hviewer/js/JsFunctions.kt b/app/src/main/java/com/paulcoding/hviewer/js/JsFunctions.kt
index 016bd04..bb42f1d 100644
--- a/app/src/main/java/com/paulcoding/hviewer/js/JsFunctions.kt
+++ b/app/src/main/java/com/paulcoding/hviewer/js/JsFunctions.kt
@@ -3,9 +3,14 @@ package com.paulcoding.hviewer.js
 import com.paulcoding.hviewer.MainApp.Companion.appContext
 import com.paulcoding.hviewer.helper.log
 import com.paulcoding.hviewer.helper.readFile
+import com.paulcoding.hviewer.network.ktorClient
+import io.ktor.client.call.body
+import io.ktor.client.request.get
+import kotlinx.coroutines.runBlocking
 import org.jsoup.Jsoup
 import org.mozilla.javascript.BaseFunction
 import org.mozilla.javascript.Context
+import org.mozilla.javascript.NativeJSON
 import org.mozilla.javascript.Scriptable
 import kotlin.io.encoding.Base64
 import kotlin.io.encoding.ExperimentalEncodingApi
@@ -17,7 +22,9 @@ val fetchFunction = object : BaseFunction() {
         thisObj: Scriptable?,
         args: Array<out Any?>
     ): Any? {
-        val url = args.getOrNull(0) as? String ?: throw IllegalArgumentException("URL is required")
+        val url = args.getOrNull(0) as? String
+        if (url.isNullOrEmpty())
+            throw IllegalArgumentException("URL is required")
 
         return runCatching {
             Jsoup.connect(url).followRedirects(true).get()
@@ -31,6 +38,28 @@ val fetchFunction = object : BaseFunction() {
     }
 }
 
+val xhrFunction = object : BaseFunction() {
+    override fun call(
+        cx: Context?,
+        scope: Scriptable?,
+        thisObj: Scriptable?,
+        args: Array<out Any>
+    ): Any {
+        val url = args.getOrNull(0) as? String
+        if (url.isNullOrEmpty())
+            throw IllegalArgumentException("URL is required")
+
+        return runBlocking {
+            ktorClient.use { client ->
+                val res: String = client.get(url).body()
+                NativeJSON.parse(
+                    cx, scope, res
+                ) { cx, scope, thisObj, args -> args[1] }
+            }
+        }
+    }
+}
+
 val logFunction = object : BaseFunction() {
     override fun call(
         cx: Context?,