getting gold info

trying to restrict text input to numbers only, need an html 5 compliant web browser supposedly

gw-record.php

@@ -3,9 +3,9 @@
 include_once 'gw-connect.php';
 $con = new mysqli(DATABASE_HOST, DATABASE_USER, DATABASE_PASS, DATABASE_NAME);
 #$toonid = mysqli_real_escape_string($con, $_POST['playerid']); //enable this after character selection is working
-$toonid = 'Chrissi Chan';
+$toonid = 'Chrissi Chan'; //delete this line after character selection is finished/working
 #$location = mysqli_real_escape_string($con, $_POST['locationid']); //enable this after location selection is working
-$location = 4;
+$location = 4; //delete this line after location selection is finished/working
 $whatdropped = mysqli_real_escape_string($con, $_POST['gwdrop']);
 if ($con->connect_errno > 0){
 	die ('Unable to connect to database [' . $db->connect_errno . ']');
@@ -72,7 +72,7 @@ if ($whatdropped == "1"){
 		echo '<OPTION VALUE="' . $typeid . '">' . $weapon . '</OPTION>';
 	}
 	echo '</SELECT>';
-	echo ' and |code for gold dropped here| gold pieces.';
+	echo ' and <INPUT TYPE="NUMBER" NAME="droppedgold" MAXLENGTH="4"> gold pieces.';
 	echo '<INPUT TYPE="HIDDEN" NAME="droptype" VALUE="1"><INPUT TYPE="HIDDEN" NAME="location" VALUE="' . $locid .'">';
 	echo ' <BR /><CENTER><INPUT TYPE="SUBMIT" VALUE="Click me!"></FORM></CENTER><BR />';
 } else if ($whatdropped == "2"){