fix js

src/arenas/tron/js.js

@@ -20,6 +20,9 @@ function changeSelect(number,botId){
         }else{
             show_bot_panel(next);
         }
+        if(number > 1){
+                document.getElementById('fightButton').setAttribute('disabled','');
+        }
     }
 }
 function show_bot_panel(number){

src/arenas/tron/public.php

@@ -29,7 +29,7 @@ foreach($bots as $bot){
    
    
 		<p><input type="checkbox" id="fullLogs"/><label for="fullLogs">view the full logs</label></p>
-	<p><input id="fightButton" type="button" value="<?php echo $lang['FIGHT']; ?>" onclick="tron(document.getElementById('bot1').value,document.getElementById('bot2').value,'<?php echo xd_check_input(2); ?>');"></p>
+	<p><input id="fightButton" disabled="disabled" type="button" value="<?php echo $lang['FIGHT']; ?>" onclick="tron(document.getElementById('bot1').value,document.getElementById('bot2').value,'<?php echo xd_check_input(2); ?>');"></p>
 	 <div id="fightResult"></div>
 
 </article>