feat: Working purchase order table and form.

Public/js/main.js

@@ -24,3 +24,21 @@ function updateDropDownSelection(id, contentId) {
   let content = document.getElementById(contentId).innerHTML;
   document.getElementById(id).innerHTML = content;
 }
+
+function openSidepanel() {
+  document.getElementById("sidepanel").style.width = "250px";
+}
+
+function closeSidepanel() {
+  document.getElementById("sidepanel").style.width = "0";
+}
+
+// Show or hide an element by id.
+function toggleContent(id) {
+  var el = document.getElementById(id);
+  if (el.style.display === "none") {
+    el.style.display = "block";
+  } else {
+    el.style.display = "none";
+  }
+}