in reply to displaying a screen while waiting for some computation

Though this a Perl forum, I am posting something related to HTML/Javascript because thats what you need. Save the below code as "index.html" 
<html>
<body>
<form name="myform" action="report.cgi" method="get">
<input type="button" value="Delayed Load" onclick="javascript:submitFo
+rm(document.myform)">
</form>

<div id="pleaseWaitDiv" style="display: none;">
<jsp:include page="loading.html"/>
</div>

<script language="javascript">
function submitForm(oForm)
{
// Hide the form
document.getElementById('myform').style.display = 'none';

// Display progress page
document.getElementById('pleaseWaitDiv').style.display = 'block';
 oForm.submit();
}
</script>

</body>
</html>

[download]
put this in a file "loading.html" 
<html>
<body>
Loading!!!!!!!!!!
</body>
</html>

[download]
Now the page "loading.html" would be displayed until "report.cgi" generates the page.Hope this helps.

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