jQuery( document ).ready(function() {

                    var chartData = new Array([0]);
                     showChart(chartData);

                    jQuery('#update').live("click", function() {
                        var qtyArr = [];

                        jQuery('input[name=qty]').each(function(i) {

                              qty =  Number(jQuery(this).val());

                              if(qty > 0){
                                qtyArr.push(qty);
                              }

                         });



                        chartData = new Array(
                            [qtyArr]
                        );

                        showChart(chartData);
                    });

               });

                 function showChart(chartData){

                    jQuery("#chart").jqBarGraph({
                        data: chartData,
                        width: 200,
                        height: 300
                    });
                }