diff --git a/SQL/sql4.php b/SQL/sql4.php
index c04fcac..c42768b 100644
--- a/SQL/sql4.php
+++ b/SQL/sql4.php
@@ -6,16 +6,23 @@
 </head>
 <body>
 
+	<div style="background-color:#c9c9c9;padding:15px;">
+      <button type="button" name="homeButton" onclick="location.href='../homepage.html';">Home Page</button>
+      <button type="button" name="mainButton" onclick="location.href='sqlmainpage.html';">Main Page</button>
+	</div>
+
+	<div align="center">
 	<form action="<?php $_SERVER['PHP_SELF']; ?>" method="post" >
 		<p>Give me book's number and I give you book's name in my library.</p>
 		Book's number : <input type="text" name="number">
-		<input type="submit" name="submit" value="Submit">
+		<input type="submit" name="submit">
 		<!--<p>Im learning something, I think?
 		    I will sanitize query this time!!
 		    //I'm the best web developer.
 		     //number is too dangerous. I have to do something.</p>
 		-->
 	</form>
+	</div>
 
 <?php
 	$servername = "localhost";
