How to configure the Download file button in jsp page design?

[leninbecse]

I am using the Database and get values from result set and stored it as string buffer..i am trying to access string buffer value in function(javascript) but displays the error..can you please help me to resolve the problem..attached my code here..


<script type="text/javascript">
function download(){<%
//Exporting the data
if(sb1 !=null){
response.setHeader("Content-Disposition","attachment; filename=statussheet.xls");
response.setHeader("cache-control", "no-cache");
ServletOutputStream outs = response.getOutputStream();
InputStream fileInputStream = new ByteArrayInputStream(sb1.toString().getBytes("UTF-8"));

byte[] outputByte = new byte[4096];
//copy binary contect to output stream
while(fileInputStream.read(outputByte, 0, 4096) != -1)
{
outs.write(outputByte, 0, 4096);
}
outs.flush();
outs.close();
}%>
</script>