added a working JS test case using the standard kotlin browser API for interacting with the DOM

js/js.translator/testFiles/stdlib/cases/browserDocumentAccess.kt

@@ -2,9 +2,10 @@ package test.browser
 
 import kotlin.browser.document
 
-fun foo() {
+fun foo(): String {
     val element = document.getElementById("foo")
     if (element != null) {
-        element.appendChild(document.createTextNode("Some Dynamically Created Contenet!!!"))
+        element.appendChild(document.createTextNode("Some Dynamically Created Content!!!"))
     }
+    return element.getTextContent()
 }