Dynamic bar chart

The JavaScript code

board = JXG.JSXGraph.initBoard('box', {boundingbox: [-1, 9, 13, -3], axis:true});
board.suspendUpdate();           

var s = board.create('slider', [[1,8],[4,8],[1,1,1.5]], {name:'S',strokeColor:'black',fillColor:'white'});
var f = [function(){return (s.Value()*4.5).toFixed(2);},
         function(){return (s.Value()*(-1)).toFixed(2);},
         function(){return (s.Value()*3).toFixed(2);},
         function(){return (s.Value()*2).toFixed(2);},
         function(){return (s.Value()*(-0.5)).toFixed(2);},
         function(){return (s.Value()*5.5).toFixed(2);},
         function(){return (s.Value()*2.5).toFixed(2);},
         function(){return (s.Value()*(-0.75)).toFixed(2);},
         function(){return (s.Value()*3.5).toFixed(2);},
         function(){return (s.Value()*2).toFixed(2);},
         function(){return (s.Value()*(-1.25)).toFixed(2);}
        ];
var colors = ['#8E1B77','#BE1679','#DC1765','#DA2130','#DB311B','#DF4917','#E36317','#E87F1A','#F1B112','#FCF302','#C1E212'];
var chart = board.create('chart', [f], {
         chartStyle:'bar', 
         width:0.8, 
         labels:f,
         colors: colors, 
         shadow:true
});

var leg = board.create('legend', [10, 8.5], {labels: f, colorArray: colors});
var dataArr = [4,1,3,2,5,6.5,1.5,2,0.5,1.5,-1];            
var chart2 = board.create('chart', dataArr, {chartStyle:'line,point'});
chart2[0].setProperty('strokeColor:black','strokeWidth:2','shadow:true');
for (var i=0; i<11;i++) {
    chart2[1][i].setProperty({strokeColor:'black',fillColor:'white',face:'[]', size:4, strokeWidth:2});
}
board.unsuspendUpdate();