Edit in JSFiddle

var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(',');
var data = [];
var count =100;
for (var i = 0; i < count; i++) {
data.push({
    id: i,
    country: countries[i % countries.length],
    date: new Date(2014, i % 12, i % 28),
    amount: Math.random() * 10000,
    active: i % 4 === 0
});
}

var grid = new wijmo.grid.FlexGrid('#gsFlexGrid');
grid.itemsSource = data;

<div id="gsFlexGrid" style="height:350px"></div>