var conn;
function checkAuth(){
    Ext.Ajax.request({
       url: '<?php echo Zend_Registry::get('config1')->site->url; ?>admin/index/checkauth',
       success: function(response){
            auth = Ext.util.JSON.decode(unescape(response.responseText)).success;

            if(auth) return;
            else document.location.href= "<?php echo Zend_Registry::get('config1')->site->url; ?>";
       }
    });
}

Ext.onReady(function(){

    var appMask;
	appMask = new Ext.LoadMask(Ext.getBody(), {msg:'Loading...'});
	appMask.show();

	conn = new Ext.data.Connection();
	conn.addListener('beforerequest', function(con){
        //Ext.util.JSON.decode(unescape(response)).success;
        checkAuth();
    });