diff --git a/js/search.js b/js/search.js
new file mode 100644
index 0000000..5934088
--- /dev/null
+++ b/js/search.js
@@ -0,0 +1,19 @@
+(function main() {
+	const success = url => window.location.replace(`${window.location.host}?source=${url}`);
+
+	// If valid source provided
+	if (urlSearchParams.has('source') && isValidHTTPURL(sourceURL))
+		success(sourceURL);
+
+	const textField = document.querySelector("input");
+	textField.addEventListener("keypress", function (event) {
+		if (event.key === "Enter") {
+			event.preventDefault();
+
+			const url = textField.value;
+			if (!isValidHTTPURL(url))
+				alert("Invalid HTTP URL.");
+			else success(url);
+		}
+	});
+})();
\ No newline at end of file