Hello Madhumita ,
thanks for responding I think part of the problem was using FusionCharts.js
We have been using
Version: 1.1 (29th June, 2007) - Added Player detection, New conditional fixes for IE.
I have upgraded the FusionCharts.js file to
Version: 1.2.4 (16th February, 2009) - Added fix for chart with % width/height.
The problems seems to have gone away I will continue testing. Though i have found that the registerWithJS property in the Fusioncharts.js doesn't seem to work with IE7 but it doesn't work firefox.
if(this.histogramChart){
this.histogramChart.setDataXML(data);
}else{
this.histogramChart = new FusionCharts("FusionCharts/SelectScatter.swf", "histogram", "100%", "100%", "0","1", "FFFFFF", "exactFit");
this.histogramChart.setDataXML(data);
this.histogramChart.render("histogram");
}