I googled it, and found this:
<html>
<script>
function mytest1()
{
var Excel, Book;
Excel = new ActiveXObject("Excel.Application");
Excel.Visible = false;
Book = Excel.Workbooks.Add()
Book.ActiveSheet.Cells(1,1).Value = document.all.my_textarea1.value;
Book.SaveAs("C:/pathToFile/TEST.xls");
Excel.Quit();
}
function mytest2()
{
var Excel;
Excel = new ActiveXObject("Excel.Application");
Excel.Visible = false;
form1.my_textarea2.value = Excel.Workbooks.Open("C:/pathToFile/TEST.xls").ActiveSheet.Cells(1,1).Value;
Excel.Quit();
}
</script>
<body>
<form name="form1">
<input type=button onClick="mytest1();" value="Send Excel Data"><input type=text name="my_textarea1" size=70 value="enter ur data here">
<br><br>
<input type=button onClick="mytest2();" value="Get Excel Data"><input type=text name="my_textarea2" size=70 value="no data collected yet">
</form>
</body>
</html>
If that doesn't help you, you can use google too. It's available in every country that has an internet connection.