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 | (function(){
 
    var buttons = document.getElementsByTagName('input');
 
        for (var i = buttons.length - 1; i >= 0; i--) {
            buttons[i].onclick = function(){
                toggleServer(this.id);
            }
        };
 
        function toggleServer(server)
        {
            if(isRunning(server) != true)
            {
                disableOthers(server);
            }
            else
            {
                enableOthers(server)
            }
        }
 
        function disableOthers(server)
        {
            for (var i = buttons.length - 1; i >= 0; i--) {
                if(buttons[i].id != server)
                {
                    buttons[i].disabled = true;
                }
            };
        }
 
        function enableOthers(server)
        {
            for (var i = buttons.length - 1; i >= 0; i--) {
                if(buttons[i].id != server)
                {
                    buttons[i].disabled = '';
                }
            };
        }
 
        function isRunning(server)
        {
            var xhr = new XMLHttpRequest();
            var response;
            xhr.open('GET', 'ajax.php?server=' + server);
 
            xhr.onreadystatechange = function()
            {
                if(xhr.readyState == 4 && xhr.status == 200)
                {
                    response = xhr.responseText;
                }
 
                return response;
            };
 
            xhr.send(null);
 
        }
 
        (function manageButtonsAtStarting()
        {
            for (var i = buttons.length - 1; i >= 0; i--) {
                if(isRunning(buttons[i].id) == 'true')
                {   
                    buttons[i].disabled = '';
                }
                else
                {
                    buttons[i].disabled = 'true';
                }
            }
        })();
 
    })(); |