diff --git a/band-plan.html b/band-plan.html
index 16b472e..1041f3a 100644
--- a/band-plan.html
+++ b/band-plan.html
@@ -35,6 +35,16 @@ div#togglebuttons>button {
 		const path = require('https://unpkg.com/path-browserify/index.js');
 
 		document.addEventListener('DOMContentLoaded', () => {
+			location.search.substr(1).split("&").forEach((param) => {
+				let p = param.split("=");
+				let key = p[0];
+				if (key === "base") {
+					document.getElementById("base_plan").value = decodeURIComponent(p[1]);
+				}
+				if (key === "add") {
+					document.getElementById("additions_plan").value = decodeURIComponent(p[1]);
+				}
+			});
 			update_plan();
 
 			document.getElementById("base_plan").addEventListener("keydown", (event) => {