Call JavaScript function when my Condition is true in JSP

Hi all,
in my jsp i wanna call a javascript function (user defined) when a particular condition si met. How to go about it ? Can anyone plz help me out. Help appreciated.

hi
yes! we can do it as follows:
in the JSP code u can include the javascript function
first u declare the Javascript function before the </head> tag in the HTML
and in the JSP u can just call the function which is as follow:
<script>call the JavaScript function()</script>
for example:
<html>
<head>
<script language="JavaScript">
function sayhi() {
alert("hi");
</script>
</head>
<body>
<%
zStr = request.getParameter("str");
if(zStr.equals("true")) {
%>
<script>sayhi();</script>
<%
else {
%>
</body>
</html>

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