Fixed a error if the user logged in with other browser than firefox

interface/web/js/scrigo.js.php

@@ -238,7 +238,10 @@ function setFocus() {
 			if(flag)break;
 		}
 */
-  document.pageForm.username.focus();
+	try {
+		document.pageForm.username.focus();
+	} catch (e) {
+	}
 }