printing values of object in jquery

I have below code that get values from a grid. Instead of printing the values, the grid is printing data in below object format. How to print values?

[object Object], [object Object], [object Object], [object Object], [object Object]

CODE:

$(document).ready(function () {
    $("#check").click(function(){
        var rows = $('#jqxgrid').jqxGrid('getrows');
        alert(rows);
    });
});