declare variables properly in who-else

fixes #186

website/who-else/index.html

@@ -69,7 +69,7 @@
             disc_systems.push(d.discovery)
           }
           const values = new Set(ils_systems.sort())
-          ils = document.getElementById('ils')
+          const ils = document.getElementById('ils')
           for (let val of values) {
               const option = document.createElement('option')
               option.innerText = val
@@ -77,7 +77,7 @@
           }
 
           const discoveries = new Set(disc_systems.sort())
-          discovery = document.getElementById('discovery')
+          const discovery = document.getElementById('discovery')
           for (let val of discoveries) {
             if (val) {
               const option = document.createElement('option')
@@ -87,7 +87,7 @@
           }
 
           // watch for a query
-          form = document.getElementById('form')
+          const form = document.getElementById('form')
 
           form.addEventListener('submit', (event) => {
               event.preventDefault()