Trying to retrieve data from user editable linear gauge

[Trying to retrieve data from user editable linear gauge]

Hi I use the following code to try to get the pointer value from an editable linear gauge.

The Jscript:

  <script language="javascript">

  //FC_ChartUpdated method is called when user has changed pointer value.

  function FC_ChartUpdated(DOMId){

alert("in function");

alert(DOMId);

//Check if DOMId is that of the chart we want

if (DOMId=="myChartId"){

 

  alert ("passed check");

  //Get reference to the chart

  var chartRef = getChartFromId(DOMId);

  //Get the changed value

  var pointerValue = chartRef.getData(0);

alert(pointerValue);

}

  }

</script>

Currently the DOMId I pass in is the ID of the Chart object as per:

var myChart = new FusionCharts("fusion/Charts/HLinearGauge.swf", "myChartId", "450", "120", "0", "0");

myChart.setDataURL("Data/Linear3.xml");

This is how I call the function to get the value:

<input type="button" name="test" value="test" onClick="javascript:FC_ChartUpdated(myChartId)">

2 Questions stem from this:

1. Upon clicking the button, I never get the alert "passed check" which means the DOMId isn't getting matched..... what am I doing wrong here?

2. How do I actually take the value and instead of putting it into an alert box, actually add it into the post or put variables when the form submits? is there a way to write it to the value of a hidden field?

Thanks in Advance,

Ken

Thanks,