javascript - How to get values using function argument in js in codeigniter -


in ajax getting values values variable, values not getting items variable. reason that?

what doing wrong? inside onload function, values variable alerted undefined. can me please? thanks.

the code using follows:

<script type="text/javascript" language="javascript">        var values;      $.ajax({                 cache : false,                 type: "get",                 url: 'chartvalues',                 format:'json',                 success: function(response)                 {                     //alert(response);                     values = response;                     //alert (values);                 }             });       window.onload = function () {             onloaddoc();     }      var chart1;       function onloaddoc() {             chart1 = new cfx.chart();chart1.getanimations().getload().setenabled(true);               var axisy = chart1.getaxisy();             axisy.setmin(0);             axisy.setmax(30);              //----assign data fields--------              var fields = chart1.getdatasourcesettings().getfields();             var field1 = new cfx.fieldmap();             field1.setname("value");             field1.setusage(cfx.fieldusage.value);             fields.add(field1);             var field2 = new cfx.fieldmap();             field2.setname("date");             field2.setusage(cfx.fieldusage.xvalue);             fields.add(field2);              chart1.setgallery(cfx.gallery.bar);              //----set sample data------------             alert (values);             var items = values;             //alert (items);              chart1.setdatasource(items);             chart1.getview3d().setenabled(true);                var chartdiv = document.getelementbyid('chartdiv1');             chart1.create(chartdiv);     }        </script>

there problem in implementation. take @ sample.

<script type="text/javascript" language="javascript">    // step 1   // on window load data using ajax   window.onload = function () {     getajaxdata();   }    // step 2   // after getting data, call chart function , pass data   function getajaxdata() {     var values;     $.ajax({       cache : false,       type  : "get",       url   : 'chartvalues',       format:'json',       success: function(values) {         onloaddoc(values);       }     });   }    // step 3   // process chart using passed data   function onloaddoc(values) {     var chart1;     chart1 = new cfx.chart();chart1.getanimations().getload().setenabled(true);     var axisy = chart1.getaxisy();     axisy.setmin(0);     axisy.setmax(30);      //----assign data fields--------     var fields = chart1.getdatasourcesettings().getfields();     var field1 = new cfx.fieldmap();     field1.setname("value");     field1.setusage(cfx.fieldusage.value);     fields.add(field1);     var field2 = new cfx.fieldmap();     field2.setname("date");     field2.setusage(cfx.fieldusage.xvalue);     fields.add(field2);      chart1.setgallery(cfx.gallery.bar);      //----set sample data------------     var items = values;     chart1.setdatasource(items);     chart1.getview3d().setenabled(true);      var chartdiv = document.getelementbyid('chartdiv1');     chart1.create(chartdiv);   }  </script>

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